Tight-lock coupler with high stability

The utility model belongs to the technical field of car couplers, and particularly relates to a tight-lock car coupler with high stability, which comprises two car couplers and a coupler head, the coupler head is arranged on one side of each car coupler, the coupler head is rotatably connected to the car couplers through a rotating shaft, one end of the coupler head is provided with an insertion hole, and the other end of the coupler head is inserted into the insertion hole. A connecting device is inserted into a through hole formed in the car coupler, and a limiting device is arranged on the connecting device. According to the tight-lock coupler with the high stability, the inserting rod is arranged and can provide certain pulling force for another coupler, so that when a vehicle runs, the pulling force borne by the coupler head is reduced, the abrasion degree of the coupler head is reduced, the service life of the coupler head is prolonged to a certain extent, and in addition, the stability of the coupler h