To clarify the impact of different infiltration models on the performance evaluation of low impact development (LID) measures, MATLAB programming was used to study the differences and applicable conditions of the constant infiltration model, the Green-Ampt model and the Horton model. Research showed that when the catchment area ratio of the LID measures was 10∶1 and the surface storage depth was 10 cm, the calculation accuracy of the infiltration rate of Green-Ampt model was higher than that of the Horton model. In terms of the calculation of overflow time, the difference between different infiltration models gradually decreased with the increase of rainfall duration, rainfall intensity and initial soil moisture contents. In terms of the calculation of runoff storage, the relative difference between the Green-Ampt model and the Horton model fitted under dry conditions was less than 5.4%, but the difference between the Horton model fitted under humid conditions and other models enlarged with the increase of rainfall duration. It is found that the Green-Ampt model has a slightly higher accuracy in the calculation of infiltration rate, but it involves multiple parameters; however the Horton model is more user friendly, but its fitting calculation is greatly affected by the soil moisture content.