要在Bootstrap中创建多个选择列表，请使用多个，
<select multiple class = "form-control">
您可以尝试运行以下代码以实现多个选择-
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <meta name = "viewport" content = "width = device-width, initial-scale = 1"> <link rel = "stylesheet" href = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css"> <script src = "https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script> <script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> </head> <body> <form role = "form"> <div class = "form-group"> <label for = "name">Country</label> <select multiple class = "form-control"> <option>India</option> <option>Australia</option> <option>US</option> </select> </div> </form> </body> </html>