Abstract: The oil sump of the automobile engine has a closed crankcase as its oil storage tank shell, which has important functions such as preventing impurities from entering, collecting and storing lubricating oil, preventing lubricating oil from oxidizing, and dissipating heat. However, the oil sump is easy to rupture when it touches the barrier. Based on this, a new type of safety protection structure for the oil sump is designed in this paper to provide a reference for the improvement of the oil sump.