The invention discloses a wind power generation system with double-rotor motor coupling and compressed air energy storage functions. The wind power generation system comprises a wind turbine, a double-rotor motor, a vortex compound machine, an air storage device and a four-quadrant converter. The double-rotor motor comprises an outer rotor, an inner rotor and a stator, the inner rotor is embedded in the outer rotor, and the stator is arranged on the outer side of the outer rotor; the wind turbine is coaxially connected with the outer rotor of the double-rotor motor, the inner rotor of the double-rotor motor is coaxially connected with the vortex compound machine, the air storage device is connected to the other end of the vortex compound machine, and the inner rotor is connected with a second converter; the stator is connected with a first converter, the first converter and the second converter are connected with a direct-current bus, and two ends of the direct-current bus are respectively connected with a DC/DC inverter and a DC/AC inverter. The wind power generation system has the advantages that energy can be stored by the aid of compressed air, accordingly, the wind power generation system is low in cost and high in capacity and can replace storage batteries; influence of wind force fluctuation on loads can be effectively improved, and the system is long in service life, simple in maintenance and low in cost.