Abstract: Selective laser melting has the characteristics of high density, high dimensional precision, small surface roughness and good mechanical properties of the forming parts, which has good engineering application prospect. According to the design criteria of a certain civil aviation engine and the regulations of civil aviation airworthiness, the feasibility of SLM forming AlSi10Mg alloy drive engine casing was comprehensively studied by using theoretical analysis, numerical modeling, experimental research and so on.The results show that the microstructure and properties of SLM formed AlSi10Mg alloy meet the requirements of airworthiness regulation CCAR25. The accessory drive casing can use the SLMed AlSi10Mg alloy. T6 heat treatment of 530 ℃/30 min, water cooling+165 ℃/6 h, air cooling can effectively improve the anisotropy of SLMed AlSi10Mg and improve the yield strength and elongation of the material to a certain extent, but reduce the tensile strength of the material.The accessory drive casing shall be tested under the maximum allowable limit load and ultimate load according to the airworthiness requirements. After finite element analysis, the AlSi10Mg alloy accessory drive casing formed by SLM under limit load will not be deformed and meets the requirements of airworthiness regulations. However, under the ultimate load, the maximum stress of the accessory drive casing is higher than the tensile strength of the SLMed AlSi10Mg alloy. The test verified that the SLMed internal pipeline of the AlSi10Mg casing does not leak or break under the pressure specified in the airworthiness regulations.