With the access of a large number of distributed photovoltaics, the operation status of the distribution network has become more complex. In order to accurately evaluate the real-time health status of distribution system, a real-time health status assessment method of distribution network is proposed, which takes into account the importance of network nodes and lines. First, consider the optimal power flow, load importance and load loss of a node in the photovoltaic access network to improve the LeaderRank algorithm, consider the power loss after a node outage and the LR value of the node to improve the load moment algorithm, use the improved electrical LeaderRank algorithm and line load moment algorithm evaluate the importance of nodes and lines in the distribution network. Then, based on the electrical and non-electrical parameters of the operation of the distribution equipment, the health indices of the distribution nodes and lines are calculated respectively. Comprehensively consider the health and importance of nodes and lines in the distribution network to calculate the health index of the distribution network to judge the health status of the distribution network. Finally, taking a 10 kV distribution network as an example, the health index is 2.266 3, which is in a general defect state.The health of the distributed PV system has been improved by appropriately increasing the PV penetration rate in the distribution network, which further verifies the effectiveness and rationality of the proposed method.