The invention discloses a multi-energy microgrid planning method for an integrated energy system. The method comprises the following steps: 1), designing a multi-energy microgrid basic architecture: interconnecting and integrating a traditional power system, a natural gas system and a thermodynamic system in a region; 2), constructing a multi-energy microgrid multi-objective collaborative planningmodel taking minimum system planning operation cost, minimum wind and light curtailment and minimum pollutant emission as objective functions, and realizing collaborative optimization planning of a plurality of energy subsystems; and 3), improving the traditional multi-objective genetic algorithm by using a Tent mapping improved chaotic optimization algorithm to form a chaotic optimization multi-objective genetic algorithm, and solving the model by using the chaotic optimization multi-objective genetic algorithm on the basis of verifying the robustness of the algorithm. According to the method, the system cost is effectively reduced while the multi-element load requirement is met, the resource allocation efficiency is remarkably improved, a forward effect is achieved on safe operation ofa large power grid system, and the method has a good application prospect.