diff --git a/problems/0977.有序数组的平方.md b/problems/0977.有序数组的平方.md
index 24276bcf..9c06d8a3 100644
--- a/problems/0977.有序数组的平方.md
+++ b/problems/0977.有序数组的平方.md
@@ -359,7 +359,28 @@ class Solution {
 }
 ```
 
-
+Kotlin:
+```kotlin
+class Solution {
+    // 双指针法
+    fun sortedSquares(nums: IntArray): IntArray {
+        var res = IntArray(nums.size)
+        var left = 0 // 指向数组的最左端
+        var right = nums.size - 1 // 指向数组端最右端
+        // 选择平方数更大的那一个往 res 数组中倒序填充
+        for (index in nums.size - 1 downTo 0) {
+            if (nums[left] * nums[left] > nums[right] * nums[right]) {
+                res[index] = nums[left] * nums[left]
+                left++
+            } else {
+                res[index] = nums[right] * nums[right]
+                right--
+            }
+        }
+        return res
+    }
+}
+```
 
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