diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 041. \346\273\221\345\212\250\347\252\227\345\217\243\347\232\204\345\271\263\345\235\207\345\200\274/README.md" "b/lcof2/\345\211\221\346\214\207 Offer II 041. \346\273\221\345\212\250\347\252\227\345\217\243\347\232\204\345\271\263\345\235\207\345\200\274/README.md"
index 2cfa24adecd46..17edcda838b61 100644
--- "a/lcof2/\345\211\221\346\214\207 Offer II 041. \346\273\221\345\212\250\347\252\227\345\217\243\347\232\204\345\271\263\345\235\207\345\200\274/README.md"	
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 041. \346\273\221\345\212\250\347\252\227\345\217\243\347\232\204\345\271\263\345\235\207\345\200\274/README.md"	
@@ -172,6 +172,36 @@ func (this *MovingAverage) Next(val int) float64 {
  */
 ```
 
+#### Swift
+
+```swift
+class MovingAverage {
+    private var arr: [Int]
+    private var s: Int
+    private var cnt: Int
+    
+    init(_ size: Int) {
+        arr = [Int](repeating: 0, count: size)
+        s = 0
+        cnt = 0
+    }
+    
+    func next(_ val: Int) -> Double {
+        let idx = cnt % arr.count
+        s += val - arr[idx]
+        arr[idx] = val
+        cnt += 1
+        return Double(s) / Double(min(cnt, arr.count))
+    }
+}
+
+/**
+ * Your MovingAverage object will be instantiated and called as such:
+ * let obj = MovingAverage(size)
+ * let param_1 = obj.next(val)
+ */
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git "a/lcof2/\345\211\221\346\214\207 Offer II 041. \346\273\221\345\212\250\347\252\227\345\217\243\347\232\204\345\271\263\345\235\207\345\200\274/Solution.swift" "b/lcof2/\345\211\221\346\214\207 Offer II 041. \346\273\221\345\212\250\347\252\227\345\217\243\347\232\204\345\271\263\345\235\207\345\200\274/Solution.swift"
new file mode 100644
index 0000000000000..df3f70ee17cc5
--- /dev/null
+++ "b/lcof2/\345\211\221\346\214\207 Offer II 041. \346\273\221\345\212\250\347\252\227\345\217\243\347\232\204\345\271\263\345\235\207\345\200\274/Solution.swift"	
@@ -0,0 +1,25 @@
+class MovingAverage {
+    private var arr: [Int]
+    private var s: Int
+    private var cnt: Int
+    
+    init(_ size: Int) {
+        arr = [Int](repeating: 0, count: size)
+        s = 0
+        cnt = 0
+    }
+    
+    func next(_ val: Int) -> Double {
+        let idx = cnt % arr.count
+        s += val - arr[idx]
+        arr[idx] = val
+        cnt += 1
+        return Double(s) / Double(min(cnt, arr.count))
+    }
+}
+
+/**
+ * Your MovingAverage object will be instantiated and called as such:
+ * let obj = MovingAverage(size)
+ * let param_1 = obj.next(val)
+ */
\ No newline at end of file