In order to reveal the effects of initial soil moisture content on the soil water infiltration property under single point of freedom muddy water film hole irrigation, the test was carried out under different initial soil moisture content. The test studied on the influence of initial soil moisture content on the infiltration characteristics，reduced infiltration characteristics and distribution of soil moisture content of single point of freedom muddy water film hole irrigation, and built film hole irrigation free irrigation model with cumulative time and permeability reducing model. The test results indicated that the infiltration capacity of per unit film hole area had decreasing trend in the same time as the increasing of the initial moisture content of the soil and the initial moisture content of 4.96%, 7.43%, 10.07% and 12.40% decreased by 19%, 33%, 45% and 56%, respectively compared with the dry conditions test. While the permeability reducing affection had increasing trend under the fixed sand percentage of muddy water and the film hole diameter. Near and far away the film hole, the gradient of water content changed in a large and it's about 2%/cm. Less change of the gradient of water content was in the middle part and it's about 0.65%/cm.