In order to obtain the best application method of super absorbent polymers (SAP) on soil and water conservation of the granite slope of red soil

the effect of SAP (mixed

layered

and furrowed) application on the erosion process of the granite slope of red soil was compared with the method of simulated rainfall experiment and lab analysis. The results indicated that: (1) the application of SAP can reduce the runoff and sediment yield and delayed the flow time on the granite slope of red soil. The mixed application of SAP and soil had a great influence on reducing the runoff and sediment yield on the granite slope of red soil in the rain intensity of 1.0 mm/min. Compared with the control slope

the cumulative runoff respectively decreased 34% and the cumulative sediment yield decreased 48% by the mixed application of SAP and soil. While layered application of SAP and soil had extremely significant effects on the runoff and sediment yield in the rain intensity of 1.5 mm/min. Compared with the control slope

the cumulative runoff respectively decreased 46% and the cumulative sediment yield decreased 67% by the layered application of SAP and soil. (2) The application of SAP had increased slope infiltration rate and soil water content

and reduced the runoff and sediment yield on the granite red soil slope. The mixed application method of SAP and soil had played a good role on soil and water conservation. (3) The effects of different application methods of SAP had significant on the runoff and sediment yield on the granite slope of red soil P＜0.05. The power function model of the cumulative runoff and cumulative sediment on the granite slope of red soil was concluded based on statistical analysis. Those results provided the theoretical basis for the runoff and sediment yield on the granite red soil slope.