要动态创建div，请使用html()方法。您可以尝试运行以下代码，以了解如何在单击按钮时动态创建div-
<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("button").click(function(){
$("body").html("<div>This is a new div.</div>");
});
});
</script>
</head>
<body>
<button>Create a new div</button>
<p>This is demo text.</p>
</body>
</html>