Abstract: Taking K4169 superalloy aeronautical casting as the research object,the causes of the casting shrinkage cavity and shrinkage porosity defects were analyzed. Taking pouring temperature, mold shell temperature and pouring time as the influencing factors, and the shrinkage cavity and shrinkage porosity as the optimization index, the Taguchi experiment method was used to optimize the superalloy precision casting process, and the single factor influence law was studied. The results show that in the case of reasonable pouring system, the order of the influence of various factors on the shrinkage porosity of castings is pouring temperature> pouring time> mold shell temperature; the optimal design parameter combination is pouring temperature of 1500℃, mold shell temperature of 1000℃, and pouring time of 4s.