Agricultural tractors are often affected by severe corrosion in field operations,and polyurea coatings are widely used in the anti-corrosion protection of agricultural machinery.In this study,polyurea coating thickness,nano-reinforcer content and anti-corrosion agent content are selected as the influencing factors,and tensile strength and section shrinkage are used as evaluation indexes to carry out three-factor three-level orthogonal test.By analyzing the interaction and varia-tion law among the factors,the mechanism of polyurea coating on the mechanical properties of agricultural tractors was clarified,and the best combination of polyurea coating parameters was further explored:when the thickness of polyurea coating was 0.4 mm,the content of nano-reinforcer was 1.5％and the content of anti-corrosion agent was 15％,the me-chanical properties of polyurea coating on agricultural tractors were the best and met the production requirements.
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