The good comprehensive performance acrylic latex waterproof coating was prepared by acrylic esters and their derivatives as the main monomers of coatings, with acrylamide and acrylonitrile as modified monomers, and appropriate functional materials. During the test, the influence of the amount of raw materials such as acrylic acid and acrylamide and the ratio of hard and soft monomers on the performance of the modified acrylic emulsion waterproof coating was analyzed. It was found that 4 parts of acrylic acid, 0.7 parts of acrylamide and 6 parts of acrylonitrile were selected, and the ratio of soft and hard monomers(BA/MMA)was 1∶1. According to this formula, excellent water resistance and aging resistance can be developed modified acrylic latex waterproof coating.