The invention discloses an active power distribution network joint optimization algorithm based on mixed integer linear programming. The algorithm comprises the steps that modeling is carried out on uncertain factors in active power distribution network programming; basic data in active power distribution network programming are input; an active power distribution network comprehensive programmingmodel which satisfies each constraint condition is constructed, and the objective function is the minimum composite cost; the nonlinear active power distribution network comprehensive programming model is linearized; and a mixed integer linear optimization algorithm is used to solve the model. According to the invention, the complex large-scale mixed integer nonlinear programming problem of active power distribution network programming is converted into a mixed integer linear programming problem through a linearization method; a mature MILP commercial solver can be used for solving; the solving difficulty of the active power distribution network programming problem is greatly simplified; and the efficiency and reliability of model solving are improved.