Abstract: Diamond coated cemented carbide cutting tools have a broad industrial application prospect,while one of the main obstacles that hinder the application of the coating is that the adhesive strength of film-substrate interface is poor,which seriously affects its normal service life.Therefore,improving the film-substrate adhesive strength and ensuring the normal service life of the tool have become the main problems to be solved when industrializing diamond coated tools.In this paper,a series of new achievements on improving the film-substrate adhesive strength of cemented carbide substrate diamond coating has been introduced,and new ideas for further improvement are proposed in order to promote the industrial application of the hot filament chemical vapor deposition(HFCVD)diamond coated tools.