diff --git a/leetcode/0434.Number-of-Segments-in-a-String/434.Number of Segments in a String.go b/leetcode/0434.Number-of-Segments-in-a-String/434.Number of Segments in a String.go
new file mode 100644
index 00000000..626caebe
--- /dev/null
+++ b/leetcode/0434.Number-of-Segments-in-a-String/434.Number of Segments in a String.go	
@@ -0,0 +1,18 @@
+package leetcode
+
+func countSegments(s string) int {
+	segments := false
+	cnt := 0
+	for _, v := range s {
+		if v == ' ' && segments {
+			segments = false
+			cnt += 1
+		} else if v != ' ' {
+			segments = true
+		}
+	}
+	if segments {
+		cnt++
+	}
+	return cnt
+}
diff --git a/leetcode/0434.Number-of-Segments-in-a-String/434.Number of Segments in a String_test.go b/leetcode/0434.Number-of-Segments-in-a-String/434.Number of Segments in a String_test.go
new file mode 100644
index 00000000..7c634601
--- /dev/null
+++ b/leetcode/0434.Number-of-Segments-in-a-String/434.Number of Segments in a String_test.go	
@@ -0,0 +1,55 @@
+package leetcode
+
+import (
+	"fmt"
+	"testing"
+)
+
+type question434 struct {
+	para434
+	ans434
+}
+
+// s 是参数
+type para434 struct {
+	s string
+}
+
+// ans 是答案
+type ans434 struct {
+	ans int
+}
+
+func Test_Problem434(t *testing.T) {
+
+	qs := []question434{
+
+		{
+			para434{"Hello, my name is John"},
+			ans434{5},
+		},
+
+		{
+			para434{"Hello"},
+			ans434{1},
+		},
+
+		{
+			para434{"love live! mu'sic forever"},
+			ans434{4},
+		},
+
+		{
+			para434{""},
+			ans434{0},
+		},
+	}
+
+	fmt.Printf("------------------------Leetcode Problem 434------------------------\n")
+
+	for _, q := range qs {
+		_, p := q.ans434, q.para434
+		fmt.Printf("【input】:%v       【output】:%v\n", p, countSegments(p.s))
+	}
+	fmt.Printf("\n\n\n")
+}
diff --git a/leetcode/0434.Number-of-Segments-in-a-String/README.md b/leetcode/0434.Number-of-Segments-in-a-String/README.md
new file mode 100644
index 00000000..976e0cfc
--- /dev/null
+++ b/leetcode/0434.Number-of-Segments-in-a-String/README.md
@@ -0,0 +1,45 @@
+# [434. Number of Segments in a String](https://leetcode-cn.com/problems/number-of-segments-in-a-string/)
+
+
+## 题目
+
+You are given a string s, return the number of segments in the string.
+
+A segment is defined to be a contiguous sequence of non-space characters.
+
+**Example 1:**
+
+    Input: s = "Hello, my name is John"
+    Output: 5
+    Explanation: The five segments are ["Hello,", "my", "name", "is", "John"]
+
+**Example 2:**
+
+    Input: s = "Hello"
+    Output: 1
+
+**Example 3:**
+
+    Input: s = "love live! mu'sic forever"
+    Output: 4
+
+**Example 4:**
+
+    Input: s = ""
+    Output: 0
+
+**Constraints**
+
+ - 0 <= s.length <= 300
+ - s consists of lower-case and upper-case English letters, digits or one of the following characters "!@#$%^&*()_+-=',.:".
+ - The only space character in s is ' '.
+
+## 题目大意
+
+统计字符串中的单词个数，这里的单词指的是连续的不是空格的字符。
+
+请注意，你可以假定字符串里不包括任何不可打印的字符。
+
+## 解题思路
+
+- 以空格为分割计算元素个数