Abstract: The power consumption of the active system in the active design network of distribution network is serious, and the disturbance of the power supply is large. The distributed photovoltaic power supply is used as the active system to re-design the distribution network. By designing the decision system of photovoltaic power access to the distribution network, the distributed photovoltaic access to the power network can be more quick and effective, and the node circuit of photovoltaic access can be analyzed equivalently to control the operation state of the node position accurately. The distributed data trust region algorithm is used to limit the power data of the access system and ensure the minimum disturbance when the photovoltaic is connected to the power grid. Finally, the power data of the access node position is recorded by experiment, and it is found that the relative deviation of the access node position is less than 1%, the node 40 is the maximum power access position, and the node 10 is the minimum access position. According to the experimental data, the contrast curve of harmonic disturbance is drawn, and it is found that the maximum disturbance contrast is reached at P40. Compared with the traditional power access method by the Power Factory simulation software, it is found that the delay time of the designed node is almost zero, the process of power connection is much smoother. Thus the superiority of the access planning scheme is verified and the feasibility of the design scheme is proved.