The invention discloses a distributed coordination control method of multiple energy storage units in a grid-connected microgrid. The distributed coordination control method is characterized in that charging and discharging behaviors of the energy storage units are coordinated by a distributed control method; and a fluctuation of active power at a common coupling point between the microgrid and a power distribution network is inhibited. The distributed coordination control method comprises the steps of abstracting the energy storage units into a second-order multi-agent system model, and then designing control algorithms of the energy storage units by utilizing the distributed coordination control method. The distributed coordination control method of the energy storage units in the grid-connected microgrid can allow the energy storage units to have the same charging state and the same power output ratio, so that purposes of fairly utilizing the energy storage units and protecting the energy storage units against unbalanced aging are achieved. In addition, the distributed coordination control method can save communication and computing resources for a control center of the microgrid, and has good robustness, adaptivity and extendibility.