In order to facilitate the operation regulation of distribution network and reduce the line loss rate of distribution network system to improve its transmission efficiency, a cluster division method of high-proportion distributed photovoltaic（PV）access to distribution network considering the matching degree of multi-section source-load features is proposed. Firstly, the distributed PV output curve connected to the distribution network and the load characteristic curve of each region are comprehensively discussed, and the matching degree index of multi-section source-load features is designed to maximize the utilization of PV in the same cluster. Moreover, the modular degree index considering the cluster structure and electrical distance, as well as the capacity matching index and reactive power compensation index considering the cluster function are comprehensively designed. The comprehensive index system is constructed to realize the division of distribution network cluster. Then, when the optimization algorithm is used to divide the distribution network cluster, the constraints based on the network adjacency matrix are added to avoid the existence of isolated nodes. Finally, taking the IEEE 33-node system as an example, the cluster division and the PV output optimization after the cluster division are carried out. The results show that the proposed cluster division considering the multi-section source-load features matching has better source-load features matching, stronger electrical coupling, and better active and reactive power balance. Compared with the case without considering the cluster division, the photovoltaic power output optimization after the distribution network cluster division can reduce the line loss rate of the distribution network system, thus improving the transmission efficiency of the distribution network.