Assembly tool of DB9 plug shell assembly

The utility model discloses an assembling tool of a DB9 plug shell assembly, which comprises a base and a mounting groove arranged on the base, two buffer holes and two supporting sleeves are arranged in the mounting groove at intervals, the two supporting sleeves are positioned on two sides of the two buffer holes, and a center connecting line of the two supporting sleeves is perpendicular to a center connecting line of the two buffer holes; a positioning clamp is installed in the installation groove in a sliding mode, a spring abutting against the positioning clamp is placed in the buffering hole, and a locking piece used for being connected with the positioning clamp is arranged on the base. The positioning clamp is provided with a positioning cavity used for positioning the DB9 plug shell assembly, the positioning clamp is further provided with two positioning holes corresponding to fastening holes in the DB9 plug shell assembly, and the supporting sleeve is inserted into the positioning holes; and the sh