It is composed of a front frame and a rear frame made of aluminum profiles, which are connected to each other by a bracket. The frame structure is wrapped with reinforced polyester fabric. When the vehicle is parked incorrectly, the sides and top of the door seal will retract due to squeezing. The top will rise automatically at this time. This avoids damage to the loading and unloading door seal of the vehicle. The front frame fixed wall has two layers of fabric-reinforced material. The top wall has an opening in the main wear area. If necessary, add a little cost to the top wall with two overlapping layers of material. Made into strips, all fixing materials and sealing strips are included when the loading and unloading door seal is provided