diff --git a/python/1572-matrix-diagonal-sum.py b/python/1572-matrix-diagonal-sum.py
new file mode 100644
index 000000000..ef72ab9eb
--- /dev/null
+++ b/python/1572-matrix-diagonal-sum.py
@@ -0,0 +1,24 @@
+
+class Solution:
+    def PrimeSum(self,mat):
+        cnt = 0
+        for i in range(len(mat)):
+            cnt += mat[i][i]
+        return cnt
+
+    def CrossSum(self,mat):
+        cnt = 0
+        for i in range(len(mat)):
+            cnt += mat[i][len(mat) - i - 1]
+        return cnt
+
+    def diagonalSum(self, mat: List[List[int]]) -> int:
+        prime = self.PrimeSum(mat)
+        cross = self.CrossSum(mat)
+
+        if len(mat) % 2 == 0:
+            return prime + cross
+        else:
+            mid = len(mat) // 2
+            mid_ele = mat[mid][mid]
+            return prime + cross - mid_ele