Abstract: To quantitatively predict and analyze the soil infiltration characteristics of vertical line source irrigation with sufficient water supply, 144 simulation scenarios were set up based on HYDRUS-2 D model, and the cumulative infiltration amounts of 9 soils under different linear source diameters and lengths were simulated.The Philip infiltration formula was used to fit the simulation data and obtain soil water sorptivity rate and steady infiltration rate.On this basis, the relationship between soil water sorptivity and steady infiltration rate with irrigation parameters were studied, and the simplified calculation model of soil cumulative infiltration of vertical line source irrigation with full water supply was established and was verified by experimental data.The results showed that for the same soil texture, the soil water sorptivity and steady infiltration rate increased with the increase of the linear source seepage area.The soil water sorptivity and the linear source seepage area showed a linear function relationship.The steady infiltration rate and the line source seepage area showed a power function relationship.The statistical indicators of EMAE and ERMSE of the simplified calculation model of cumulative soil infiltration were between 1.57～2.05 L and 2.38～2.88 L,ENSE≥0.92,the calculated values were in good agreement with the measured values, and the simplified calculation model had a good prediction effect.It was possible to predict the infiltration of vertical linear source irrigation with sufficient water supply only by soil physical parameters(Ks).