Abstract: Soil water infiltration is mainly influence by pressure head, initial soil water content, soil bulk density and grain gradation. In this paper, Study on the influence of these factors on infiltration capacity based on the ponding infiltration experiments in one-dimensional vertical soil colunm，soil infiltration parameters were obtained by Green-Ampt and Philip infiltration model, the influence of the four factors on cumulative infiltration, saturated hydraulic conductivity, stable infiltration rate, wetting front suction and soil sorption rate was studied by grey correlation analysis. Results show that the four factors significantly affected cumulative infiltration, infiltration rate and the parameters of the Green-Ampt and Philip infiltration models. In all treatments, the error of saturated hydraulic conductivity and stable infiltration rate is small, there is a high degree of similarity between the fitted values of soil sorption rate and the calculated values using wetting front suction and the coefficient of determination is greater than 0.85；The results of grain gradation correlation analysis showed that the soil composition correlation degree was the highest(0.946 3), soil bulk density, initial water content is secondly, and pressure head have the least effect (0.726 4). All in all, soil composition plays a dominant role in soil infiltration characteristics, the research results can provide theoretical support for agricultural irrigation and water resources management.