For an evaluation system of grid-integrated PV generation is proposed little in former reference, this paper establishes a comprehensive and reasonable evaluation system. Firstly, four indexes are defined to reflect the voltage and frequency fluctuation, namely influence coefficient, discrete degree, skewness coefficient and maximum volatility. Also, evaluation indexes which reflect the total harmonic distortion (THD) in distribution network are put forward, namely mean THD and pass rate. Another two indexes named improvement index of system loss and net loss change rate are proposed to reflect the change of net loss. Then, variation coefficient method is used to obtain the weight of every index. Combined with the technique for order preference by similarity to ideal solution (TOPSIS) method, a new evaluation system of grid-integrated PV generation is established. Finally, the proposed evaluation system is applied to one area of Henan province so as to choose its optimal PV access mode.