diff --git a/README.md b/README.md
index fd45e12..3e6cc29 100644
--- a/README.md
+++ b/README.md
@@ -429,6 +429,10 @@ gitlink-cli pr +create --owner Gitlink --repo forgeplus -t "feat: Search feature
 # Create a PR (from a fork)
 gitlink-cli pr +create --owner Gitlink --repo forgeplus -t "feat: New feature" --head your_username/forgeplus:feature/my-feature --base master
 
+# The fork form auto-resolves GitLink fork metadata
+# so you do not need to pass merge_user_login or fork_project_id yourself
+gitlink-cli pr +create --owner Gitlink --repo forgeplus -t "fix: CLI bug" --head your_username/forgeplus:fix/bug --base master
+
 # View a PR
 gitlink-cli pr +view --owner Gitlink --repo forgeplus -i 42
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 9bbfda5..2ef6256 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -439,6 +439,10 @@ gitlink-cli pr +create --owner Gitlink --repo forgeplus -t "feat: 搜索功能"
 # 创建 PR（从 Fork 仓库）
 gitlink-cli pr +create --owner Gitlink --repo forgeplus -t "feat: 新功能" --head your_username/forgeplus:feature/my-feature --base master
 
+# Fork 写法会自动补齐 GitLink 所需的 fork 元数据
+# 不需要再手动传 merge_user_login 或 fork_project_id
+gitlink-cli pr +create --owner Gitlink --repo forgeplus -t "fix: CLI bug" --head your_username/forgeplus:fix/bug --base master
+
 # 查看 PR
 gitlink-cli pr +view --owner Gitlink --repo forgeplus -i 42
 
diff --git a/doc/changes/pr-create-fork-support.md b/doc/changes/pr-create-fork-support.md
new file mode 100644
index 0000000..cef805f
--- /dev/null
+++ b/doc/changes/pr-create-fork-support.md
@@ -0,0 +1,30 @@
+# PR Create Fork Support
+
+## Summary
+
+This change makes `gitlink-cli pr +create` work with the fork syntax already documented in the README:
+
+```bash
+gitlink-cli pr +create --owner Gitlink --repo forgeplus \
+  -t "feat: New feature" \
+  --head your_username/forgeplus:feature/my-feature \
+  --base master
+```
+
+## What changed
+
+- Parse `owner/repo:branch` fork heads in `pr +create`
+- Auto-resolve the fork repository metadata required by GitLink:
+  - `merge_user_login`
+  - `merge_project_identifier`
+  - `fork_project_id`
+- Auto-fill compare counts when available so the request matches GitLink's real PR create flow more closely
+- Keep same-repo PR creation behavior unchanged
+
+## Validation
+
+- `go test ./...`
+- Unit tests for:
+  - same-repo PR creation payload
+  - fork PR creation payload
+  - invalid fork head syntax
diff --git a/shortcuts/pr/pr.go b/shortcuts/pr/pr.go
index 0837ba6..4983f1b 100644
--- a/shortcuts/pr/pr.go
+++ b/shortcuts/pr/pr.go
@@ -1,6 +1,7 @@
 package pr
 
 import (
+	"encoding/base64"
 	"fmt"
 	"net/url"
 	"strings"
@@ -55,13 +56,9 @@ func Shortcuts() []*common.Shortcut {
 				if base == "" {
 					base = "master"
 				}
-				payload := map[string]interface{}{
-					"title": title,
-					"head":  head,
-					"base":  base,
-				}
-				if b := ctx.Arg("body"); b != "" {
-					payload["body"] = b
+				payload, err := buildCreatePRPayload(ctx, title, head, base, ctx.Arg("body"))
+				if err != nil {
+					return err
 				}
 				env, err := ctx.CallAPI("POST", ctx.RepoPath()+"/pulls", payload)
 				if err != nil {
@@ -551,3 +548,146 @@ func numberField(m map[string]interface{}, key string) (float64, bool) {
 		return 0, false
 	}
 }
+
+type prHeadSpec struct {
+	Branch      string
+	ForkOwner   string
+	ForkRepo    string
+	IsFork      bool
+	CompareHead string
+}
+
+func buildCreatePRPayload(ctx *common.RuntimeContext, title, head, base, body string) (map[string]interface{}, error) {
+	spec, err := parsePRHead(head)
+	if err != nil {
+		return nil, err
+	}
+
+	payload := map[string]interface{}{
+		"title":            title,
+		"head":             spec.Branch,
+		"base":             base,
+		"assigned_to_id":   "",
+		"fixed_version_id": "",
+		"issue_tag_ids":    []string{},
+		"reviewer_ids":     []string{},
+		"receivers_login":  []string{},
+		"priority_id":      "2",
+		"is_original":      spec.IsFork,
+	}
+	if body != "" {
+		payload["body"] = body
+	}
+
+	if spec.IsFork {
+		repoInfo, err := fetchProjectInfo(ctx, spec.ForkOwner, spec.ForkRepo)
+		if err != nil {
+			return nil, err
+		}
+		projectID, err := extractFloatField(repoInfo, "project_id", "id")
+		if err != nil {
+			return nil, fmt.Errorf("resolve fork project id: %w", err)
+		}
+		identifier, err := extractStringField(repoInfo, "project_identifier", "identifier")
+		if err != nil {
+			return nil, fmt.Errorf("resolve fork project identifier: %w", err)
+		}
+		payload["merge_user_login"] = spec.ForkOwner
+		payload["merge_project_identifier"] = identifier
+		payload["fork_project_id"] = int(projectID)
+	}
+
+	compareCounts, err := fetchPRCompareCounts(ctx, spec.CompareHead, base)
+	if err == nil {
+		if commits, ok := compareCounts["commits_count"]; ok {
+			payload["commits_count"] = commits
+		}
+		if files, ok := compareCounts["files_count"]; ok {
+			payload["files_count"] = files
+		}
+	}
+
+	return payload, nil
+}
+
+func parsePRHead(head string) (*prHeadSpec, error) {
+	if head == "" {
+		return nil, fmt.Errorf("source branch cannot be empty")
+	}
+	if !strings.Contains(head, ":") {
+		return &prHeadSpec{
+			Branch:      head,
+			IsFork:      false,
+			CompareHead: head,
+		}, nil
+	}
+
+	parts := strings.SplitN(head, ":", 2)
+	if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
+		return nil, fmt.Errorf("invalid --head %q, expected owner/repo:branch", head)
+	}
+
+	repoParts := strings.Split(parts[0], "/")
+	if len(repoParts) != 2 || repoParts[0] == "" || repoParts[1] == "" {
+		return nil, fmt.Errorf("invalid --head %q, expected owner/repo:branch", head)
+	}
+
+	return &prHeadSpec{
+		Branch:      parts[1],
+		ForkOwner:   repoParts[0],
+		ForkRepo:    repoParts[1],
+		IsFork:      true,
+		CompareHead: repoParts[0] + ":" + parts[1],
+	}, nil
+}
+
+func fetchProjectInfo(ctx *common.RuntimeContext, owner, repo string) (map[string]interface{}, error) {
+	env, err := ctx.CallAPI("GET", fmt.Sprintf("/%s/%s", owner, repo), nil)
+	if err != nil {
+		return nil, fmt.Errorf("fetch project info: %w", err)
+	}
+	data, ok := env.Data.(map[string]interface{})
+	if !ok {
+		return nil, fmt.Errorf("unexpected project info response format")
+	}
+	return data, nil
+}
+
+func fetchPRCompareCounts(ctx *common.RuntimeContext, head, base string) (map[string]int, error) {
+	encodedHead := base64.RawURLEncoding.EncodeToString([]byte(head))
+	encodedBase := base64.RawURLEncoding.EncodeToString([]byte(base))
+	env, err := ctx.CallAPI("GET", fmt.Sprintf("%s/compare/%s...%s", ctx.RepoPath(), encodedHead, encodedBase), nil)
+	if err != nil {
+		return nil, err
+	}
+	data, ok := env.Data.(map[string]interface{})
+	if !ok {
+		return nil, fmt.Errorf("unexpected compare response format")
+	}
+	result := map[string]int{}
+	if v, ok := data["commits_count"].(float64); ok {
+		result["commits_count"] = int(v)
+	}
+	if v, ok := data["files_count"].(float64); ok {
+		result["files_count"] = int(v)
+	}
+	return result, nil
+}
+
+func extractFloatField(data map[string]interface{}, keys ...string) (float64, error) {
+	for _, key := range keys {
+		if v, ok := data[key].(float64); ok {
+			return v, nil
+		}
+	}
+	return 0, fmt.Errorf("missing numeric field %v", keys)
+}
+
+func extractStringField(data map[string]interface{}, keys ...string) (string, error) {
+	for _, key := range keys {
+		if v, ok := data[key].(string); ok && v != "" {
+			return v, nil
+		}
+	}
+	return "", fmt.Errorf("missing string field %v", keys)
+}
diff --git a/shortcuts/pr/pr_test.go b/shortcuts/pr/pr_test.go
index 75bffde..438f6ca 100644
--- a/shortcuts/pr/pr_test.go
+++ b/shortcuts/pr/pr_test.go
@@ -1,6 +1,7 @@
 package pr
 
 import (
+	"encoding/base64"
 	"encoding/json"
 	"fmt"
 	"net/http"
@@ -54,6 +55,135 @@ func TestPRCommentPostsToCorrectIssueJournal(t *testing.T) {
 	assertEqual(t, journalPayload["notes"], "LGTM, looks good!")
 }
 
+func TestPRCreateSameRepoBranchUsesSimplePayload(t *testing.T) {
+	var payload map[string]interface{}
+	encodedHead := base64.RawURLEncoding.EncodeToString([]byte("feature/search"))
+	encodedBase := base64.RawURLEncoding.EncodeToString([]byte("master"))
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "GET" && r.URL.Path == "/owner/repo/compare/"+encodedHead+"..."+encodedBase+".json":
+			writeJSON(t, w, map[string]interface{}{
+				"commits_count": float64(2),
+				"files_count":   float64(5),
+			})
+		case r.Method == "POST" && r.URL.Path == "/owner/repo/pulls.json":
+			payload = decodeJSON(t, r)
+			writeJSON(t, w, map[string]interface{}{"status": float64(0), "pull_request_number": float64(22)})
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	}))
+	defer server.Close()
+
+	err := runPRShortcut(t, server, "create", map[string]string{
+		"title": "feat: search",
+		"head":  "feature/search",
+		"base":  "master",
+		"body":  "Add search support",
+	})
+	if err != nil {
+		t.Fatalf("create shortcut failed: %v", err)
+	}
+
+	assertEqual(t, payload["head"], "feature/search")
+	assertEqual(t, payload["base"], "master")
+	assertEqual(t, payload["is_original"], false)
+	assertEqual(t, payload["commits_count"], float64(2))
+	assertEqual(t, payload["files_count"], float64(5))
+	if _, ok := payload["merge_user_login"]; ok {
+		t.Fatal("same-repo PR should not include merge_user_login")
+	}
+}
+
+func TestPRCreateForkBranchAddsGitLinkForkFields(t *testing.T) {
+	var payload map[string]interface{}
+	encodedHead := base64.RawURLEncoding.EncodeToString([]byte("alice:feature/JIRA-123/fix"))
+	encodedBase := base64.RawURLEncoding.EncodeToString([]byte("master"))
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case r.Method == "GET" && r.URL.Path == "/alice/fork-repo.json":
+			writeJSON(t, w, map[string]interface{}{
+				"project_id":         float64(1546652),
+				"project_identifier": "fork-repo",
+			})
+		case r.Method == "GET" && r.URL.Path == "/owner/repo/compare/"+encodedHead+"..."+encodedBase+".json":
+			writeJSON(t, w, map[string]interface{}{
+				"commits_count": float64(3),
+				"files_count":   float64(7),
+			})
+		case r.Method == "POST" && r.URL.Path == "/owner/repo/pulls.json":
+			payload = decodeJSON(t, r)
+			writeJSON(t, w, map[string]interface{}{"status": float64(0), "pull_request_number": float64(23)})
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+	}))
+	defer server.Close()
+
+	err := runPRShortcut(t, server, "create", map[string]string{
+		"title": "feat: fork support",
+		"head":  "alice/fork-repo:feature/JIRA-123/fix",
+		"base":  "master",
+	})
+	if err != nil {
+		t.Fatalf("create shortcut failed: %v", err)
+	}
+
+	assertEqual(t, payload["head"], "feature/JIRA-123/fix")
+	assertEqual(t, payload["is_original"], true)
+	assertEqual(t, payload["merge_user_login"], "alice")
+	assertEqual(t, payload["merge_project_identifier"], "fork-repo")
+	assertEqual(t, payload["fork_project_id"], float64(1546652))
+	assertEqual(t, payload["commits_count"], float64(3))
+	assertEqual(t, payload["files_count"], float64(7))
+}
+
+func TestFetchPRCompareCountsUsesURLSafeBase64(t *testing.T) {
+	encodedHead := base64.RawURLEncoding.EncodeToString([]byte("alice:feature/fork"))
+	encodedBase := base64.RawURLEncoding.EncodeToString([]byte("master"))
+
+	if encodedHead != "YWxpY2U6ZmVhdHVyZS9mb3Jr" {
+		t.Fatalf("unexpected encoded head: %s", encodedHead)
+	}
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		wantPath := "/owner/repo/compare/" + encodedHead + "..." + encodedBase + ".json"
+		if r.Method != "GET" || r.URL.Path != wantPath {
+			t.Fatalf("unexpected request: %s %s, want GET %s", r.Method, r.URL.Path, wantPath)
+		}
+		writeJSON(t, w, map[string]interface{}{
+			"commits_count": float64(4),
+			"files_count":   float64(9),
+		})
+	}))
+	defer server.Close()
+
+	ctx := &common.RuntimeContext{
+		Client: &client.Client{
+			HTTP:    server.Client(),
+			BaseURL: server.URL,
+		},
+		Owner: "owner",
+		Repo:  "repo",
+	}
+
+	counts, err := fetchPRCompareCounts(ctx, "alice:feature/fork", "master")
+	if err != nil {
+		t.Fatalf("fetchPRCompareCounts failed: %v", err)
+	}
+
+	assertEqual(t, counts["commits_count"], 4)
+	assertEqual(t, counts["files_count"], 9)
+}
+
+func TestParsePRHeadRejectsInvalidForkSyntax(t *testing.T) {
+	_, err := parsePRHead("alice:feature/fork")
+	if err == nil {
+		t.Fatal("expected invalid head syntax to fail")
+	}
+}
+
 func TestPRCommentFailsWhenPRNotFound(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
@@ -328,15 +458,18 @@ func TestPRListStateAllOmitsStatus(t *testing.T) {
 
 func TestPRCreate(t *testing.T) {
 	var payload map[string]interface{}
+	encodedHead := base64.RawURLEncoding.EncodeToString([]byte("feature/x"))
+	encodedBase := base64.RawURLEncoding.EncodeToString([]byte("master"))
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != "POST" {
-			t.Fatalf("expected POST, got %s", r.Method)
+		switch {
+		case r.Method == "GET" && r.URL.Path == "/owner/repo/compare/"+encodedHead+"..."+encodedBase+".json":
+			writeJSON(t, w, map[string]interface{}{"commits_count": float64(1), "files_count": float64(2)})
+		case r.Method == "POST" && r.URL.Path == "/owner/repo/pulls.json":
+			payload = decodeJSON(t, r)
+			writeJSON(t, w, map[string]interface{}{"id": float64(42), "title": "feat: new"})
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
 		}
-		if r.URL.Path != "/owner/repo/pulls.json" {
-			t.Fatalf("unexpected path: %s", r.URL.Path)
-		}
-		payload = decodeJSON(t, r)
-		writeJSON(t, w, map[string]interface{}{"id": float64(42), "title": "feat: new"})
 	}))
 	defer server.Close()
 
@@ -357,9 +490,18 @@ func TestPRCreate(t *testing.T) {
 
 func TestPRCreateNoBody(t *testing.T) {
 	var payload map[string]interface{}
+	encodedHead := base64.RawURLEncoding.EncodeToString([]byte("feature/y"))
+	encodedBase := base64.RawURLEncoding.EncodeToString([]byte("master"))
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		payload = decodeJSON(t, r)
-		writeJSON(t, w, map[string]interface{}{"id": float64(43), "title": "feat: nob"})
+		switch {
+		case r.Method == "GET" && r.URL.Path == "/owner/repo/compare/"+encodedHead+"..."+encodedBase+".json":
+			writeJSON(t, w, map[string]interface{}{"commits_count": float64(0), "files_count": float64(0)})
+		case r.Method == "POST" && r.URL.Path == "/owner/repo/pulls.json":
+			payload = decodeJSON(t, r)
+			writeJSON(t, w, map[string]interface{}{"id": float64(43), "title": "feat: nob"})
+		default:
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
 	}))
 	defer server.Close()