diff --git a/mindspore/python/mindspore/scipy/linalg.py b/mindspore/python/mindspore/scipy/linalg.py
index 91cd7dba850..c9b66a60cf5 100755
--- a/mindspore/python/mindspore/scipy/linalg.py
+++ b/mindspore/python/mindspore/scipy/linalg.py
@@ -189,6 +189,7 @@ def solve_triangular(a, b, trans=0, lower=False, unit_diagonal=False,
                        'a', 'data type')
     trsm_type_in_check(b.dtype, [mstype.int32, mstype.int64, mstype.float32, mstype.float64],
                        'b', 'data type')
+    trsm_type_in_check(a.dtype, b.dtype, ('a', 'b'), 'data type', fmt='match')
 
     _solve_check(func_name, a.shape, b.shape)
     trsm_value_check(debug, None, 'debug', op='is', fmt='todo')
diff --git a/mindspore/python/mindspore/scipy/utils_const.py b/mindspore/python/mindspore/scipy/utils_const.py
index 1a5132500be..db8b0830284 100644
--- a/mindspore/python/mindspore/scipy/utils_const.py
+++ b/mindspore/python/mindspore/scipy/utils_const.py
@@ -98,6 +98,15 @@ def _tuple(x):
 
 
 def pytype_to_mstype(type_):
+    """
+    Convert python type to MindSpore type.
+
+    Args:
+        type_: A python type object.
+
+    Returns:
+        Type of MindSpore type.
+    """
     return {
         Tensor: tensor_type,
         CSRTensor: csr_tensor_type,