The present invention discloses an energy storage prospect distribution control method of smoothing microgrid tie line power. The energy storage prospect distribution control method of smoothing the microgrid tie line power can solve the problem of the microgrid power balance control in the condition having new energy random fluctuation. Specifically, a finite time rapid distribution power control protocol is enforced between energy storage individuals to realize the control target of smoothing the microgrid tie line output power, and the power regulation margin and the cost of energy storage are considered in the enforcement process for a time in the future. The energy storage prospect distribution control method of smoothing the microgrid tie line power considers the rapid fluctuation characteristics of the new energy curve and the energy storage device physics restriction, the regulation power of an energy storage polymer is obtained through solution of the model prediction control (MPC) problems for a time in the future, and the finite time rapid distribution power control protocol is designed based on the sliding-mode control (SMC) method to allow the charging and discharging power of the energy storage in the polymer to rapidly track a target power so as to realize the target of smoothing the microgrid tie line power.