The invention provides an energy internet planning method based on mixed integer programming. The method comprises the following steps: S1, collecting relevant data information required for modeling;S2, establishing an energy internet model based on mixed integer programming according to the constraint relationship of the relevant data information; S3, linearizing the energy internet model; and S4, using the linearized energy internet model to plan the energy internet. The lowest operation cost of the system is taken as the objective function, the power system problem is involved,the constraint of the natural gas system, the coupling of the power and natural gas systems and the influence of the two systems on the operation of the energy internet system are considered, thus realizing the optimal planning of the energy internet system.