Energy-absorbing anti-collision mechanism for truck

The invention relates to the technical field of vehicle protection, and relates to an energy-absorbing anti-collision mechanism for a truck. The anti-collision mechanism comprises a sliding rail, a sliding block, a containing rack, a spare tire and a stop lever. The sliding rail is used for being fixed to a girder at the tail of a truck and is arranged in the length direction of the truck; the sliding block is arranged on the sliding rail; the containing rack is arranged on the lower side of the sliding block in a liftable manner; the spare tire is used for being detachably mounted on the containing rack and extends out of the tail part of the containing rack; one end of the stop lever is rotationally connected with the girder; and the stop lever is pushed by the containing rack to rotatewhen the sliding block slides forwards, so that the other end of the stop lever abuts against the ground. According to the technical scheme, due to the fact that the spare tire is the flexible part, collision of a sedan can b