Preparation and Study on Multiphase Ceramics Gu Ping; （ Postgraduate,State Key Lab. of Advance Tech. for Materials Sys. and Pro.,WUT, Wuhan 430070, China.） Fu Zhengyi; Wang Weimin The preparation technology, mechanical properties, microstructures and mechanisms of strengthening and toughening of multiphase ceramics are reviewed. The new trend is to develop the multiple and various level hybrid toughening multiphase ceramics. multiphase ceramics; preparation technology; mechanisms of strengthening and toughening