<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> table{ border-collapse: collapse; 200px; height: 100px; /* collapse 边框合并，如果相邻的话，共用一个框 separate 默认值，边框分开，不合并 */ } </style> </head> <body> <table border="1"> <thead> <tr> <th>class</th> <th>name</th> <th>age</th> </tr> </thead> <tbody> <tr> <td>20</td> <td colspan="2">保密</td> <!--<td>16</td>--> </tr> <tr> <td rowspan="2">21</td> <td>郭校歌</td> <td>16</td> </tr> <tr> <!--<td>21</td>--> <td>三花</td> <td>18</td> </tr> </tbody> </table> </body>