diff --git a/Algorithms/220. Contains Duplicate III/220. Contains Duplicate III.go b/Algorithms/220. Contains Duplicate III/220. Contains Duplicate III.go
new file mode 100644
index 00000000..5426efa1
--- /dev/null
+++ b/Algorithms/220. Contains Duplicate III/220. Contains Duplicate III.go	
@@ -0,0 +1,21 @@
+package leetcode
+
+func containsNearbyAlmostDuplicate(nums []int, k int, t int) bool {
+	if len(nums) <= 1 {
+		return false
+	}
+	if k <= 0 {
+		return false
+	}
+	n := len(nums)
+	for i := 0; i < n; i++ {
+		count := 0
+		for j := i + 1; j < n && count < k; j++ {
+			if abs(nums[i]-nums[j]) <= t && j != i {
+				return true
+			}
+			count++
+		}
+	}
+	return false
+}
diff --git a/Algorithms/220. Contains Duplicate III/220. Contains Duplicate III_test.go b/Algorithms/220. Contains Duplicate III/220. Contains Duplicate III_test.go
new file mode 100644
index 00000000..18761e0d
--- /dev/null
+++ b/Algorithms/220. Contains Duplicate III/220. Contains Duplicate III_test.go	
@@ -0,0 +1,64 @@
+package leetcode
+
+import (
+	"fmt"
+	"testing"
+)
+
+type question220 struct {
+	para220
+	ans220
+}
+
+// para 是参数
+// one 代表第一个参数
+type para220 struct {
+	one []int
+	k   int
+	t   int
+}
+
+// ans 是答案
+// one 代表第一个答案
+type ans220 struct {
+	one bool
+}
+
+func Test_Problem220(t *testing.T) {
+
+	qs := []question220{
+
+		question220{
+			para220{[]int{7, 1, 3}, 2, 3},
+			ans220{true},
+		},
+
+		question220{
+			para220{[]int{-1, -1}, 1, -1},
+			ans220{false},
+		},
+
+		question220{
+			para220{[]int{1, 2, 3, 1}, 3, 0},
+			ans220{true},
+		},
+
+		question220{
+			para220{[]int{1, 0, 1, 1}, 1, 2},
+			ans220{true},
+		},
+
+		question220{
+			para220{[]int{1, 5, 9, 1, 5, 9}, 2, 3},
+			ans220{false},
+		},
+	}
+
+	fmt.Printf("------------------------Leetcode Problem 220------------------------\n")
+
+	for _, q := range qs {
+		_, p := q.ans220, q.para220
+		fmt.Printf("【input】:%v       【output】:%v\n", p, containsNearbyAlmostDuplicate(p.one, p.k, p.t))
+	}
+	fmt.Printf("\n\n\n")
+}
diff --git a/Algorithms/220. Contains Duplicate III/README.md b/Algorithms/220. Contains Duplicate III/README.md
new file mode 100644
index 00000000..836cb49c
--- /dev/null
+++ b/Algorithms/220. Contains Duplicate III/README.md	
@@ -0,0 +1,31 @@
+# [220. Contains Duplicate III](https://leetcode.com/problems/contains-duplicate-iii/)
+
+## 题目
+
+Given an array of integers, find out whether there are two distinct indices i and j in the array such that the absolute difference between nums[i] and nums[j] is at most t and the absolute difference between i and j is at most k.
+
+Example 1:
+
+```c
+Input: nums = [1,2,3,1], k = 3, t = 0
+Output: true
+```
+
+Example 2:
+
+```c
+Input: nums = [1,0,1,1], k = 1, t = 2
+Output: true
+```
+Example 3:
+
+```c
+Input: nums = [1,5,9,1,5,9], k = 2, t = 3
+Output: false
+```
+
+## 题目大意
+
+给出一个数组 num，再给 K 和 t。问在 num 中能否找到一组 i 和 j，使得 num[i] 和 num[j] 的绝对差值最大为 t，并且 i 和 j 之前的绝对差值最大为 k。
+
+这道题就按照题意来，两层 for 循环。
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