Over 90% of passenger car wheels are made of aluminum alloys by a low-pressure casting process. Casting defects are among the most important factors influencing the mechanical properties and service safety of automotive wheels. Therefore, controlling casting defects effectively not only is a product quality issue but also impacts the safety of the entire vehicle. The influence of the low-pressure casting process on shrinkage pores is systematically studied and summarized in this paper. To predict the generation of shrinkage porosity defects in low pressure casting hubs, the effects of process parameters such as pouring temperature, mold preheating temperature, filling rate and holding pressure on the formation of shrinkage porosity were studied. The results show that increasing the pouring temperature and mold preheating temperature increases the filling capacity and reduces the shrinkage porosity to a certain extent. However, overheating the mold or a super high pouring temperature will lead to the opposite effects. In addition, slower filling at the laminar stage significantly reduces the shrinkage porosity on the premise of successful filling, and a high holding pressure helps with closing the pores.