The temperature control is one of basic conditions required for the productionof artificial diamond,In order to solve the existent problems of the heating systems used inChina currently,model HGK constant power controller has been developed. An introductionto the general situation of heating systems now used in China,the basis for the scheme deter-mination in the development of constant power controller and the concept of controller designis made in this paper,including the tests and practical application of this controller.