SAP for agriculture can be slowly released and absorbed repeatedly. It can be placed in the soil of the root to form a "micro-reservoir" which can maintain a moist environment. It can effectively enhance water and fertilizer of soil conservation capacity, improve water and fertilizer utilization, improve soil structure and increase soil permeability, which create a good growth environment for plants. At the same time, it can be used repeatedly in the soil environment, which can maintain a long-term permeability of the soil, prevent soil hardening, and be beneficial to the soil. Meanwhile it will improve the original ecological environment. This product plays an important role in drought-resistant and bumper harvest of crops in arid and semi-arid areas, drought resistance and increasing yield of fruits and vegetables, retaining fresh of flowers, urban horticulture, trees drought resistance and desert vegetation protection.