Abstract: The recent development of waterborne chlorinated polypropylene was reviewed. The characteristics of mechanical method，phase inversion method and chemical modification method (including emulsion graft polymerization，suspension polymerization and solution graft polymerization) were discussed，and both advantages and disadvantages of various methods were also pointed out. The application of waterborne CPP in coating systems as primer and additive were introduced. The prospect of waterborne CPP coatings was also presented.