diff --git a/base/goroutine/gomaxprocs/main.go b/base/goroutine/gomaxprocs/main.go
new file mode 100644
index 0000000..60dcc9b
--- /dev/null
+++ b/base/goroutine/gomaxprocs/main.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+	"sync"
+)
+
+var wg = new(sync.WaitGroup)
+
+func a() {
+	defer func() {
+		wg.Done()
+	}()
+
+	for i := 0; i < 10; i++ {
+		fmt.Printf("A: %d\n", i)
+	}
+}
+
+func b() {
+	defer func() {
+		wg.Done()
+	}()
+
+	for i := 0; i < 10; i++ {
+		fmt.Printf("B: %d\n", i)
+	}
+}
+
+func main() {
+	// goroutine 初始栈大小为2k
+
+	// 设置 最大 线程数
+	// 默认为 CPU 线程数
+	// 线程过多会增加 上下文切换负担
+	runtime.GOMAXPROCS(1)
+	wg.Add(2)
+	go a()
+	go b()
+	wg.Wait()
+}
diff --git a/base/goroutine/main.go b/base/goroutine/main.go
new file mode 100644
index 0000000..0398b3a
--- /dev/null
+++ b/base/goroutine/main.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func hello(i int) {
+	fmt.Println("hello:", i)
+}
+
+func main() {
+	for i := 0; i < 100; i++ {
+		// 开启一个单独的 goroutine 任务
+		go hello(i)
+	}
+
+	fmt.Println("main")
+	time.Sleep(1 * time.Millisecond)
+	// main 函数结束时 由 main 函数 启动的 goroutine 任务也随之结束
+}
diff --git a/base/goroutine/sync/main.go b/base/goroutine/sync/main.go
new file mode 100644
index 0000000..0bf0f49
--- /dev/null
+++ b/base/goroutine/sync/main.go
@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+var wg = new(sync.WaitGroup)
+
+func hello(i int) {
+	defer wg.Done()
+	fmt.Println("hello:", i)
+}
+
+func main() {
+	for i := 0; i < 100; i++ {
+		// 开启一个单独的 goroutine 任务
+		wg.Add(1)
+		go hello(i)
+	}
+
+	fmt.Println("main")
+	// 等待所有线程结束
+	wg.Wait()
+}