Pop-up rear bumper of water sprinkler for strip mine

An elastic rear bumper for a strip mine sprinkler comprises a bumper body, a cantilever is arranged on the bumper body and hinged to a girder of the sprinkler through a second pin shaft, a baffle perpendicular to the girder is arranged at the bottom of the girder, a through hole is formed in the baffle, a first pin shaft is arranged in the through hole, and a first spring is arranged on the first pin shaft in a sleeving mode. One end of the first spring abuts against the baffle, the other end of the first spring abuts against a check block at the end of the first pin shaft, and the check block abuts against the cantilever. According to the pop-up rear bumper of the water sprinkler for the strip mine, the spring mechanism is additionally arranged, so that the pop-up rear bumper can automatically retract to the lower portion of the chassis when being collided with the bumper, can automatically upwarp when supporting the bottom and can return to the original position when the vehicle runs normally, and the situa