The invention discloses a single three-phase multi-microgrid power coordination control method considering a dispatching condition of a distribution network. According to the method, the three-phase unbalance constraint of the system is taken into consideration; the power value of a net call wire of each sub microgrid is optimized based on particle swarm optimization; meanwhile, each energy storage output value is calculated through strategy-making based on the related state of each energy storage system; example verification proves that the method can stratify the power instruction requirement of the call wire, and the three-phase unbalance degree of the system can be lowered; the coordination control process belongs to parallel regulation, and each sub microgrid jointly participates in the power regulation process of the call wire, so that the power coordination and control time is relatively short; the power instruction value can be achieved rapidly; by taking the three-phase unbalance degree as the power coordination and control constraint condition of the multi-microgrid call wire, the three-phase unbalance degree of the system is lowered; the transformer equipment loss of the distribution network and the electric energy loss of the power grid are lowered; by adoption of the single three-phase multi-microgrid power coordination control method considering the dispatching condition of the distribution network, the unbalance degree and the loss of the light-preserving type microgrid are lowered; the power fluctuation of the call wires between the microgrid and the large power grid can be restrained; the adverse influence on the power grid from the microgrid is reduced; and the practicability of the microgrid engineering is improved.