大家给看看我这句话那有错误
Dim cmd As New OleDb.OleDbCommand("delete * from IPtel where ID_tel = '" & txt_del.Text & "')", conn)

(注：conn为链接的数据库）

Dim cmd As New OleDb.OleDbCommand("delete * from IPtel where ID_tel = '" & txt_del.Text & "'", conn)

你的多了一个右括号

delete from IPtel where ID_tel = '" & txt_del.Text & "'"

谢谢了，问题解决了。