The invention provides a transmission shaft crumple structure which comprises transmission shafts and a crumple energy absorption device. The transmission shafts comprise the large-diameter transmission shaft and the small-diameter transmission shaft, wherein the large-diameter transmission shaft is a pipe shaft, and one end of the small-diameter transmission shaft is arranged in a pipe hole of the large-diameter transmission shaft in a matching mode. The crumple energy absorption device is arranged in the pipe hole of the large-diameter transmission shaft, one end of the crumple energy absorption device is fixedly connected with the large-diameter transmission shaft, the other end of the crumple energy absorption device abuts against the end, stretching into the large-diameter transmission shaft, of the small-diameter transmission shaft, the crumple energy absorption device comprises outer rings and inner rings, the outer rings and the inner rings are coaxially arranged, the end faces of the outer rings abut against the end faces of the inner rings, and contact faces of the outer rings and the inner rings are inclined faces. The transmission shaft crumple structure can solve the problems that a general transmission shaft crumple structure is prone to causing secondary damage and parts cannot be recycled.