Abstract: The output power of distributed photovoltaic（PV） is frequently fluctuated, uncertain and difficult to predict because of environmental impacts. Its high-penetrated integration into distribution network has brought partial overvoltage problem, and its decentralized access has increased the difficulty of control further. Therefore, this paper proposed a reactive power and voltage robust control method considering uncertain delay for active distribution network. This method takes full advantage of the PV reactive power regulation ability to solve the partial overvoltage problem of the distribution network with various uncertainties. First of all, considering the uncertainty of photovoltaic output power and load in the distribution network, an H∞ robust voltage controller, based on the multi-cell model, was designed to achieve the inhibition of the overvoltage. Secondly, an uncertain delay compensation model was proposed to solve the control lag problem caused by communication delay and closed-loop control. Finally, a simulation model of PG＆E 69 nodes was built in Matlab/Simulink and a case study was analyzed to show that the proposed method can adapt to the dynamic operating state of distribution network with high-penetrated distributed PVs and can improve the speed and efficiency of distribution network’s voltage control.