Clay minerals, phosphates, alkaline materials, organic materials are common improvers in the management of Cd polluted soil. This paper systematically summarized types of common soil improvers and their passivation mechanism of Cd in soil. It reviewed advances in researches of soil improvers. Besides, it introduced major problems in four common passivating agents for management of Cd polluted soil. Finally, according to different mechanism characteristics of passivating agents, it came up with some recommendations.