设置table 的 style="table-layout:fixed;" 然后设置td的 style="word-wrap:break-word;"
<table style="TABLE-LAYOUT: fixed" border="1" cellspacing="0" cellpadding="0" width="200"><tbody><tr><td style="WORD-WRAP: break-word" width="20">sssssssssssssssssssssssssssssssssssssssssssssss </td><td>aaaaa</td></tr><tr><td style="WORD-WRAP: break-word" width="20">sssssssssssssssssssssssssssssssssssssssssssssss </td><td>aaaaa</td></tr></tbody></table>