The utility model relates to the technical field of wire pipe penetration. The utility model relates to an auxiliary tool, in particular to an auxiliary tool for cable pipe penetration. The device comprises a clamping mechanism and a traction mechanism, the clamping mechanism comprises a clamping sheet and a connecting ring; the number of the clamping pieces is two. Each clamping piece comprises afirst fixing block. The first fixing block is in a semi-circular ring shape. One end of the first fixing block is connected with a connecting block; the connecting block is in a semi-circular ring shape. The outer diameter of the connecting block is smaller than that of the first fixing block; threads are formed in the outer wall of the connecting block; threads are formed in the inner wall of the connecting ring; the traction mechanism comprises a shell, a circular through hole is formed in the middle of the shell, an annular electromagnet is arranged in the shell, a first fixing block is made of metal iron, and the device is convenient and easy to operate and can effectively improve the threading efficiency.