Abstract: To ensure the stability of the wind farm power collection line in the course of transmitting power flow,a corridor planning method of the wind farm power collection line is proposed under the condition of high proportion flexible load connection. To begin with,two high proportion flexible loads-industrial high energy load and flexible load-are dispatched and connected,and then are taken as the objective function of the corridor planning method of the wind farm collector line.Second,the power flow constraint of the wind farm power collection line is constructed to limit the line transmission power flow, and the high proportion flexible load constraint is designed, and then the line corridor planning method is constructed by combining the power flow constraint and the high proportion flexible load constraint. Third, the ant colony algorithm is used to obtain the global optimal solution and obtain the best planned line. Finally,the experimental results show that this method has obvious peak shaving and valley filling ability after connection of high proportion flexible load.