diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/README.md"
index 32ca8a9344f3c..2113b8e0ab836 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/README.md"	
@@ -254,6 +254,36 @@ class NumMatrix {
  */
 ```
 
+#### Swift
+
+```swift
+class NumMatrix {
+    private var prefixSum: [[Int]]
+
+    init(_ matrix: [[Int]]) {
+        let m = matrix.count
+        let n = matrix[0].count
+        prefixSum = Array(repeating: Array(repeating: 0, count: n + 1), count: m + 1)
+        
+        for i in 1...m {
+            for j in 1...n {
+                prefixSum[i][j] = prefixSum[i - 1][j] + prefixSum[i][j - 1] - prefixSum[i - 1][j - 1] + matrix[i - 1][j - 1]
+            }
+        }
+    }
+
+    func sumRegion(_ row1: Int, _ col1: Int, _ row2: Int, _ col2: Int) -> Int {
+        return prefixSum[row2 + 1][col2 + 1] - prefixSum[row2 + 1][col1] - prefixSum[row1][col2 + 1] + prefixSum[row1][col1]
+    }
+}
+
+/**
+ * Your NumMatrix object will be instantiated and called as such:
+ * let obj = NumMatrix(matrix);
+ * let param_1 = obj.sumRegion(row1,col1,row2,col2);
+ */
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/Solution.swift" "b/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/Solution.swift"
new file mode 100644
index 0000000000000..e322fe13bc7a5
--- /dev/null
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 013. \344\272\214\347\273\264\345\255\220\347\237\251\351\230\265\347\232\204\345\222\214/Solution.swift"	
@@ -0,0 +1,25 @@
+class NumMatrix {
+    private var prefixSum: [[Int]]
+
+    init(_ matrix: [[Int]]) {
+        let m = matrix.count
+        let n = matrix[0].count
+        prefixSum = Array(repeating: Array(repeating: 0, count: n + 1), count: m + 1)
+        
+        for i in 1...m {
+            for j in 1...n {
+                prefixSum[i][j] = prefixSum[i - 1][j] + prefixSum[i][j - 1] - prefixSum[i - 1][j - 1] + matrix[i - 1][j - 1]
+            }
+        }
+    }
+
+    func sumRegion(_ row1: Int, _ col1: Int, _ row2: Int, _ col2: Int) -> Int {
+        return prefixSum[row2 + 1][col2 + 1] - prefixSum[row2 + 1][col1] - prefixSum[row1][col2 + 1] + prefixSum[row1][col1]
+    }
+}
+
+/**
+ * Your NumMatrix object will be instantiated and called as such:
+ * let obj = NumMatrix(matrix);
+ * let param_1 = obj.sumRegion(row1,col1,row2,col2);
+ */
\ No newline at end of file