Abstract: Based on the indoor experiment of single film hole point source fertile solution infiltration, the distribution characteristics of water content and NO^－₃-N concentration in wetted-body were researched. The mathematic models of water content and NO^－₃-N concentration distribution were put forward. Results show that the accuracy of these models is high and the models are consistent with the law of the water content and NO^－₃-N concentration distribution. According to water content and NO^－₃-N concentration distribution models, the relationships among water content, the concentration of NO^－₃-N and radius of wetted-body are ascertained. These researches have laid a foundation for further studyof the influence factors in film hole fertile solution infiltration.