Abstract: High proportion of renewable energy penetration is the core feature of low-carbon power system in the future. More and more distributed PVs are connected to the low-voltage distribution network in China, which brings serious overvoltage problems to the operation of the distribution network. It is urgent to carry out the research on the maximum access capacity of distributed PV in the distribution network. Therefore, an evaluation method of photovoltaic acceptance capacity of distribution network considering source load uncertainty is proposed. Moreover, the PV output inteval and load fuzzy models are established, respectively, considering the difference of source load uncertainty; the possible violation risk is defined to quantify the overvoltage risk caused by source load uncertainty in distribution network operation. On this basis, a distributed photovoltaic acceptance capacity evaluation method considering possible violation risk is proposed. Finally, the IEEE 34 bus distribution network is compared with the traditional deterministic photovoltaic acceptance capacity evaluation method to verify the low conservation and effectiveness of the method. In addition, the sensitivity of the simulation parameters of the method to the evaluation results is analyzed, and the effects of OLTC tap position and SVC parameters on photovoltaic acceptance capacity in distribution network are further explored.