An experiment about 4 kinds of absorbent polymers,they were conducted to study water absorbency and retention,relationship between water absorbency and particle size,and refrigeration effect on water absorbency and retention.The results showed that all these absorbent polymers had powerful water absorbency,but the water absorbing ability depended on the kind of absorbent polymers.Functional absorbent polymer(L) with maximum water absorption rate had a clear water absorbent peak in distilled water,while Hanbaobei(B) and nutrition(N) absorbent polymer with no obvious peak required more time to reach to the saturation point and water absorption rate of plant absorbent polymer(D) was greater than the one of B and N absorbent polymer during the initial stage,and became lower after that.The water absorbency was distilled waterwell watersoil solution,and no obvious difference in the later two,while L had the largest water absorbent rate,then B and N,D was the lowest,when they were in the same solution.At the same water absorption,the 4 kinds existed significant and insignificant differences periods,while the greater the water absorbency is,the longer time is required for complete dehydration,if they absorb water adequately.Besides,water absorbency was not only influenced by solution but also particle size.Moreover,refrigeration treatments had little effect on both water absorbency and retention.