Large capacity, medium and long time scale gravity energy storage technology is an important means of new energy consumption and power system peak shaving. According to the operation characteristics of MW-level solid gravity energy storage system and the problem of intermittent power fluctuation caused by multi-weight switching, a solid gravity energy storage system is designed and a multi-machine coordinated system operation strategy is proposed. Firstly, the structure, operation characteristics and energy storage characteristics of the shaft-type gravity energy storage system are analyzed, the main electrical equipment and load types are determined, and its mathematical model is established. On this basis, the grid-connected simulation system of gravity energy storage motor is constructed, and two soft start modes of variable frequency electric auxiliary and variable load mechanical auxiliary are proposed. The single-machine control of power generation electric and the multi-machine coordinated operation strategy of linear variable frequency speed regulation are proposed. Finally, based on MATLAB / Simulink platform simulation, the feasibility and effectiveness of the designed MW-level gravity energy storage system and operation control strategy are verified.