Referring to the durability requirements and corrosion environment classification standards of ISO 12944，a comprehensive analysis of the technical indicators of existing coating systems，accumulated corrosion aging data over the years，and test data provided by coating suppliers had been conducted to determine the polyaspartate polyurea（PAE）coating system suitable for engineering machinery painting. Based on local standardsin Jiangsu Province and the actual situation of the coating production line，the environmental protection and fire protection requirements for PAE polyurea coatings were determined throughtheoretical calculations. The construction performance requirements for PAE polyurea coatingswere determined based on the coating characteristics of construction machinery products.Referring to the existing technical requirements for engineering machinery coatings，the performance requirements of PAE polyurea coating composite coatings were developed. Thepreliminary test of polyaspartate polyurea coating and composite coating plate test were carriedout according to the five-step method of coating selection. Based on the advantages of polyaspartate polyurea coating and related literature introduction，it could be used in construction machinery coating.