diff --git a/html/BFC的作用.html b/html/BFC的作用.html
new file mode 100644
index 0000000..379a93a
--- /dev/null
+++ b/html/BFC的作用.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Document</title>
+  <style>
+    .first {
+      height: 100px;
+      background-color: bisque;
+    }
+
+    .bfc {
+      overflow: hidden;
+      height: 100px;
+      background-color: blue;
+    }
+
+    .position {
+      position: absolute;
+      height: 30px;
+      width: 30px;
+      background-color: #fff;
+    }
+  </style>
+</head>
+<body>
+  <div class="first"></div>
+  <div class="bfc">
+    <div class="position"></div>
+  </div>
+</body>
+</html>
\ No newline at end of file
