Based on the research on the PR control method with fixed parameters, a fuzzySquasiSPR method is proposed for the nonlinear characteristics of photovoltaic grid connected inverter system. Firstly, the structure of single-phase photovoltaic grid connected inverter is introduced, besides, detailed analyses are made for the working principle of quasi PR control algorithm, the discretization method and harmonic filter. Then, theSfuzzyScontrol and quasiSSPR controlSare combined toSapply to grid connected inverter synchronization. At last, by using the Matlab/simulinkSplatform simulation and experimental verification, the simulation experiment results are shown that the proposed fuzzy quasi PR method can effectively improve the tracking effect compared with the traditional quasi PR method.So this method has great application value.