The invention relates to a method for self-lubricating an automobile damping steel plate, which realizes that engine oil is filled in a seam of the automobile damping steel plate through an auxiliary oil storage pump (10), a distribution device (9) connected with the auxiliary oil storage pump and a draining assembly which is connected with the distribution device (9) and consists of a felted wool (5) embedded with a nozzle tip (8) and is closely attached to one side of a damping steel plate (2). The method is to use the auxiliary oiling mechanism and make the oiling mechanism closely attached to the automobile damping steel plate, and make lubricant enter the seam of the steel plate at proper time through the function of the felted wool containing oil, thereby eliminating noise between springs of the automobile steel plate. The method is simple and practical, can ensure smoothness of form, and is a feasible measure to safe running.