Car coupler assembling device

The invention relates to a coupler assembling device, and relates to the technical field of wagon coupler assembling. The car coupler assembling device comprises a main machine body capable of containing a coupler head and a coupler tail, a feeding frame is arranged on the main machine body, the feeding frame can move to the position below aligned connecting holes of the coupler head and the coupler tail, and an eccentric pin capable of moving along the feeding frame and entering the connecting holes is arranged in the feeding frame. The feeding frame is provided with two positioning units located on the two sides of the eccentric pin respectively, one end of each positioning unit is hinged to the feeding frame, and the other end of each positioning unit is free and can abut against the eccentric pin. When the coupler is connected, the eccentric pin does not need to be manually inserted, the labor intensity of workers is reduced, the eccentric pin can be located in the center position in the hole when inserte