Abstract: Distributed photovoltaic power with the large scale has switched in distribution network, lead to circuit nodes added, and increase the difficulty operations of the distribution network. Combined with the existing grid, Operator is difficult to real-time monitoring safe distribution network when photovoltaic switched, including reliable voltage, harmonic, frequency, reactive power and other critical data, certainly will influence the safety of the power distribution network, exist stable and reliable operation of the "black spots" and safe hidden trouble. Aiming at this problem, this paper analyzes the influence of distributed photovoltaic power generation for power distribution network as well as the problems existing grid scheme, put forward the corresponding solving measures, so as to reduce the impact on the distribution network after the distributed photovoltaic access, ensure the safe, stable and reliable distribution network operation.