The invention relates to a gear shaft part comprehensive locking assembler. The gear shaft part comprehensive locking assembler comprises a frame and a power distribution control box; the frame is provided with a locking carrier device matched with a gear shaft; the locking carrier device is matched with a gear sleeving mechanism on the upper side and a short shaft inserting device on the lower side; the frame is provided with a carrier base; a hole with the aperture larger than the diameter of the gear shaft is formed in the center of the carrier base; the carrier base is provided with a fixed clamping block and a movable clamping block matched with each other; the movable clamping block is connected with a movable clamping cylinder on the carrier base; the fixed clamping block and the movable clamping block are matched with a middle fixed block on the gear shaft; and the gear sleeving mechanism, the short shaft pressing mechanism and the movable clamping cylinder are connected to the power distribution control box. The gear shaft part comprehensive locking assembler comprehensively clamps the irregular middle fixed block through the fixed clamping block and the movable clamping block, guarantees no deviation of the gear shaft in the assembly process, and meanwhile, prevents a fixed part from directly acting on the gear shaft to prevent damage of the gear shaft so as to improve the assembly effect.