The randomness and volatility of household photovoltaic (HHPV) have become the key factors restricting network consumption. The high proportion of HHPV grid-connected affects the static voltage stability of the regional network. The impact of HHPV access on the voltage fluctuations of the distribution network is studied in this paper by analyzing the HHPV system. A reactive power optimization method for distribution network with HHPV accessed based on genetic algorithm (GA) is proposed. Finally, the IEEE33 node distribution network model is used to simulate the HHPV access to the distribution network under different penetration rates. The feasibility and accuracy of the proposed reactive power optimization method for distribution network with HHPV accessed has been verified, which can effectively solve the problem of voltage fluctuations in distribution network.