diff --git a/mindspore/context.py b/mindspore/context.py
index 6eb120f527d..e423467e4dd 100644
--- a/mindspore/context.py
+++ b/mindspore/context.py
@@ -569,9 +569,17 @@ def set_context(**kwargs):
             create the files in the same directory. For example, the `device_id` can be generated by
             `device_id = os.getenv("DEVICE_ID")` and the `save_graphs_path` can be set by
             `context.set_context(save_graphs_path="path/to/ir/files"+device_id)`.
-        enable_graph_kernel (bool): Whether to enable composition of basic primitives. These primitives would be
-            compiled into a fused kernel automatically. Default: False.
-        graph_kernel_flags (str): Set graph_kernel flags.
+        enable_graph_kernel (bool): Whether to enable graph kernel fusion to optimize network execution performance.
+             Default: False.
+        graph_kernel_flags (str): Optimization options of graph kernel fusion. Experienced user only.
+             For example, `context.set_context(graph_kernel_flags="--opt_level=2 --dump_as_text")`.
+             Some general options:
+              - opt_level: optimization level between 0 and 3. Default: 2. Graph kernel fusion can be enabled
+                           equivalently by setting opt_level greater than 0.
+              - dump_as_text: dump detail info as text files. Default: false.
+             More options can be referred from the implementation code.
+             These options can also be set by environment variable `MS_GRAPH_KERNEL_FLAGS`, without modifying
+             network source code. For example, `export MS_GRAPH_KERNEL_FLAGS="--opt_level=2 --dump_as_text"`.
         reserve_class_name_in_scope (bool) : Whether to save the network class name in the scope. Default: True.
              Each node has a scope. A scope of a subnode is the name of its parent node. If reserve_class_name_in_scope
              is set, the class name will be saved after keyword 'net-' in the scope. For example: