Previous experimental studies show that geotextile reinforcement can effectively mitigate the liquefaction of saturated sand under earthquake. In view of the research on liquefaction resistance of saturated sand, the previous research methods were often limited to indoor dynamic triaxial tests and lacked the research on liquefaction resistance of geotextile reinforced sand ground. Firstly, the parameter calibration of different geotextile reinforced sand was carried out combined with the results of corresponding cyclic triaxial test of liquefaction resistance. On this basis, using OpenSees, an open-source finite element numerical simulation platform, numerical research on liquefaction resistance of saturated sand ground under different geotextile reinforcement cases was carried out. The results show that geotextile reinforcement can reduce the excess pore pressure and displacement of sand ground, and the liquefaction resistance of sand ground increases with the increase of geotextile layers. This technique of realizing numerical modeling of geotextile reinforced sand by parameter calibration method can provide some valuable reference for numerical simulation of similar reinforced soil stratum.