The water leakage in the trunk of Lefeng automobile is caused by lax sealing of sealing strip or damage and deformation of trunk. Waterproofing of all parts of the car is ensured by using sealing strips, which are made of rubber material, because this rubber material has certain strength and hardness and generally does not deform during use. However, the sealing strip on the car is a consumable, which will age when exposed to the outside air for a long time, and it will be used frequently, which will also cause a certain degree of wear and tear on the sealing strip. Once the sealing strip is broken, the car will leak water.