Tailboard loading and unloading device for truck

The invention belongs to the technical field of truck loading and unloading equipment, and discloses a truck loading and unloading tail plate device which comprises a mounting frame, two mounting rods, a rotating block, a loading and unloading tail plate, two first oil cylinders and two second oil cylinders. The free end of a piston rod of the second oil cylinder is hinged to the rotating blocks, a first connecting rod is arranged between the two rotating blocks, and a buffering structure is arranged on the first connecting rod. The buffering structure comprises two sliding plates arranged on the first connecting rod in a sliding mode, elastic bodies arranged at the two ends of the first connecting rod and connected with the sliding plates, and a first buffering rod body arranged between the two sliding plates in a connected mode, the first buffering rod body is in an arc shape, and the first buffering rod body protrudes towards the side away from the mounting frame to form a first buffering part. The technic