Abstract: To conduct research on the profile modification of inner gear of cam profile rolling movable teeth transmission,4 parameters modification modes based on inner gear profile equation and numerical control manufactures are proposed and the universal equation for inner gear profile modification is established.Ac- cording to the current of inner gear parameters changing and forcing trait,two compounded profile modifica- tion ways,Crest-Root Compound and Angle-Crest-Root Compound are suggested.Then an example for ex- plaining the above is demostrated,which shows that we can get expectant result through compound modification