Cementing quality plays an important role in the later development and utilization of hot dry rock. In view of the problems of high temperature and the incomplete technical system of high temperature cement in hot dry rock exploration Well GR1 in Datong Basin， this paper presents the approach to the development of the high temperature cement slurry technology system through investigation of the geological characteristics of the exploration area and the cementing experience on hot dry rock wells at home and abroad. The results show that the high temperature cementing slurry system which is suitable for Shanxi high temperature dry hot rock wells can be created with the water-gel ratio of high-temperature cementing slurry for hot dry rock wells at 0.45， and the preferred additive of high temperature water loss reducer CG82L， high temperature retarder H40L， high temperature stabilizer CF40L， defoaming agent GX-1， and silicon powder and HV-PAC. The cement slurry system has been successfully applied in Shanxi high temperature hot dry rock Well GR1， and the field cementing quality was good. The research results provide valuable experience and technical support for the same type of high-temperature cementing work in the future.