Silicate water shutoff agent system，chemical shutoff technology and its application examples were reviewed. The silicate water shutoff agent system was divided into four types，such as silicate gel water shutoff agent system，silicate precipitation water shutoff agent system，mixed silicate water shutoff agent system and particle silicate water shutoff agent system. The silicate chemical shutoff technology was divided into three types，including single fluid shutoff method，double fluid shutoff method and mixed slug shutoff method. The effect of silicate chemical water shutoff technology in Jidong，Daqing and Tahe oilfield was introduced. The research suggestions and prospects of silicate chemical water shutoff technology were put forward.