The utility model discloses a novel transmission shifting fork shaft interlocking block, and belongs to the technical field of automobile accessories. The block body and the four claw parts are of cuboid structures; the four claw parts are fixed to the upper ends and the lower ends of the left side face and the right side face of the block body respectively, the block body and the four claw partsare the same in thickness, the opposite faces of the two claw parts located on the same side are fixedly connected with the two ends of one protruding part respectively, the side faces of the two protruding parts are fixedly connected with the block body, and the block body, the four claw parts and the two protruding parts are integrally formed. The interlocking block can be assembled at will, thesituation of wrong assembly is avoided, and the problem of gear disorder caused by failure of the interlocking block is thoroughly solved.