In this study, high quality machinable ceramics was prepared from the K2O-MgO-Al2O3-SiO2-B2O3-F glass system using domestic pyrophyllite. The mixture of pyrophyllite and additives was melted at 1450$^{circ}C$ for 1 hour and formed in a graphite mold. The base glass was heat-treated at 600$^{circ}C$ to 1200$^{circ}C$ with interval of 50$^{circ}C$ for 3 hours identified by XRD. Crystalline phase were confirmed by XRD and their microstructure was observed by SEM. The glass ceramics which was prepared by heat treatment of base glass at 1150$^{circ}C$ for short time has good physical, mechanical, thermal, chemical properties and machinability.