Constant-velocity drive shaft assembly provided with shaft end differential lock

A constant-velocity drive shaft assembly provided with a shaft end differential lock comprises a central fixing type constant-velocity universal joint, a telescoping type constant-velocity universal joint, an intermediate shaft, a hub, a holding rack, a star-shaped sleeve, steel balls, an inner ring, a left holding rack, a first bearing, a second bearing, a dustproof cover, a right dustproof coverand a nut, wherein the surface, in contact with the steel balls, of a bell-shaped housing is an arc-shaped surface; one surface, close to the holding rack, of the star-shaped sleeve is also an arc-shaped surface; the surfaces, in contact with left steel balls, of the telescoping constant-velocity universal joint and the inner ring are cylindrical surfaces; a left involute spline and a convex ringare arranged at the right end of the hub; a right involute spline which is corresponding to the left involute spline, and a concave ring which is corresponding to the convex ring are arranged in themiddle end of a central fix