The key technology for the preparation of a new automotive surface waterborne coating with high-performance was studied.A kind of acrylate modified polyurethane aqueous dispersion was prepared as the paint film matrix.Through the selectivity research of the functional water-based additives and process conditions,with the hydrophilic modified polyisocyanate curing agent,a new waterborne automotive surface coating with high-performance material was prepared,which has high luster,good fullness,good colour retention,light stability and excellent mechanical properties.It is of great significance in the waterborne development journey of the automobile body painting industry.