The tow-component polyurea / acrylic polyurethane composite coating for spray was prepared by using hydroxyl acrylic resins and polyaspartic. The basic properties of the coatings were investigated, and the influences of the ratio of two resins and flow agent on the properties of coating were studied. The results show that when using hydroxy acrylic resin and polyaspartic at 35 : 45 , flow agent 0 . 3 % , the composite coating provides excellent comprehensive performance and anti-aging properties.