| In view of the problem of unstable operation of the traditional island running microgrid, a load power distribution method based on the pilot node is proposed to improve the power distribution method to improve the reliability of the island running microgrid. Firstly, the DC microgrid voltage of the system is determined, and the correlation fitness function of the pilot node selection matrix is taken as the objective function. Based on the standard particle swarm optimization algorithm, the pilot node of the island microgrid is selected to stabilize the region voltage. The main problem of traditional droop control is the fluctuation of bus voltage and the low precision of load power distribution. droop control load power allocation accuracy, compensation bus voltage drop problem, finally achieve droop control to ensure island operation microgrid load power allocation optimization. The experimental results show that the method achieves a remarkable effect of microgrid load power distribution, which can restore the bus voltage to a stable operation state.