Disclosed is a dynamic matching method for improving wind power generation efficiency at medium and low wind speeds. The method includes: acquiring dynamic matching parameters at medium and low wind speeds; storing the acquired dynamic matching parameters; performing real-time wind speed measurement to obtain real-time wind speed; determining the value relationship between the real-time wind speed and the preset dynamic matching wind speed to obtain a determining resu and according to the determining result, acquiring the dynamic matching parameters; achieving a mechanical energy-accumulating speed-increasing state according to the dynamic matching parameters; converting to a mechanical energy-releasing electrical power-generating state after the rotational speed of the wind turbine is increased to be the sum of the rotational speed with maximum wind energy capture and the increment of the rotational speed; and completing the dynamic matching when the rotation speed is reduced to the rotational speed with maximum wind energy capture.
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