Because the characteristic of distributed photovoltaic and its output varies from environment, it’s likely to cause power quality problems after it is accessed to grid. This paper considers power quality problems in distributed PV planning stage in distributed network and introduces a planning method considering power quality problems of distributed photovoltaic power generation. After determining the planning method based on the optimal configuration about maximum allowed capacity of photovoltaic power, this paper selects the total harmonic distortion of access point, voltage deviation and voltage fluctuations as characteristic quantity data of network power quality; and uses envelopment analysis methods to assess power quality levels at access point; aiming at the proposals which do not meet the power quality standards, the correction programs are given. Then a distributed photovoltaic power generation planning program whose power quality meets standard level is proposed. And the effectiveness will be demonstrated in calculation example. This work is supported by National Natural Science Foundation of China (No. 51207113).