Abstract: Aiming at the assessment question of distributed generator hosting capacity in distribution network,a method based on adaptive perturbation differential evolution（APDE）was proposed to evaluate the maximum hosting capacity of distributed power in distribution network. Firstly,a distribution network model including on-load tap changer and static var compensator is established,and the expression of the relationship between power flow calculation and injected power is optimized. By considering the uncertainty of distributed generator and loads,a model for evaluating the maximum hosting capacity of distributed generator in distribution network based on chance constraints is established. Then the differential evolution algorithm is improved to form an adaptive perturbation differential evolution algorithm to solve the model. Finally,based on IEEE-33 node distribution system,the distribution network model is analyzed to verify that it meets the needs of power system analysis. Furthermore,the proposed method for evaluating the hosting capacity of distributed generation in distribution network is analyzed. The feasibility of the proposed model and the effectiveness of the improved method are proved by comparing with the related algorithms.