diff --git a/lesson8/main.py b/lesson8/main.py
new file mode 100644
index 0000000000000000000000000000000000000000..2869a5f6e75064104bd5cd3a45d647fe563da570
--- /dev/null
+++ b/lesson8/main.py
@@ -0,0 +1,29 @@
+import threading
+
+
+def main():
+    t1 = threading.Thread(target=print_nums)
+    t2 = threading.Thread(target=print_letters)
+    t1.start()
+    t2.start()
+
+    # 阻塞主线程
+    t1.join()
+    t2.join()
+    print("main thread is finish")
+
+
+def print_nums():
+    for i in range(100):
+        print(i)
+    print("t1 is finish")
+
+
+def print_letters():
+    for i in range(ord('a'), ord('z')):
+        print('%c' % i)
+    print("t2 is finish")
+
+
+if __name__ == '__main__':
+    main()