The thickening effect of polyacrylamide can effectively improve the soil structure, increase the number of soil aggregates and the surface roughness of soil, reduce the soil bulk density, improve the total porosity and capillary porosity of soil, keep the soil particle and pore structure stable, significantly increase the soil infiltration rate and increase the soil water content. In addition, polyacrylamide has anti-corrosion function. When rainfall occurs, raindrops impact on the soil surface and disperse the soil particles, which will make it move and produce splash erosion. At the same time, the impact of raindrops will destroy the surface soil structure, block the soil pores, reduce the rainfall infiltration and increase the surface runoff. Once the runoff gathers, rill erosion will occur, which will double the amount of soil loss. One of the effective ways to increase rainfall infiltration is to maintain the structure of soil surface, increase the overall stability of aggregates and inhibit the formation of soil crust. Polyacrylamide can prevent soil and water loss in the process of rain, increase soil water and fertilizer conservation, improve soil permeability and drought resistance, and provide conditions for crop yield. In addition, polyacrylamide can effectively reduce the runoff loss, especially the loss of pesticides adsorbed on the soil and the loss of surface phosphorus into rivers or lakes. The experimental results of Gongyi Filter Industry Co.,Ltd media show that after the application of polyacrylamide, the emergence rate of crops can be improved.