介绍了保水剂的作用机理，综述了高分子保水剂在农业、林业水土保持及绿化中的应用研究进展，分析了保水剂在水土保持作用中的的影响因素，并就新型保水剂的研究应用进行展望。

In this article， the functional mechanisms of water-retaining agent was introduced， the applied research progress of polymer water-retaining agent in agricultural， forestry， soil and water conservation， and the application research in the afforest engineering was summarized， the influencing factors in application processes of soil and water conservation were analyzed， and the research on new-type water-retaining agent was prospected.

S157.2