The invention provides a wind power plant equating method based on a low voltage ride through period control strategy. The method comprises the following steps that an active current control value and a reactive current control value of a wind generator set are calculated; the sum of actual active current control values of a wind power plant and the sum of actual reactive current control values of the wind power plant are calculated; the sum of equivalent active current control values of the wind power plant and the sum of equivalent reactive current control values of the wind power plant are calculated; the final equivalent unit number of the wind generator set is determined. The wind power plant equating method based on the low voltage ride through period control strategy is based on a scalar multiplication method, and is a method for equating the wind power plant to a plurality of units which are completely the same and determining the reasonable number of the equivalent units, and the expected result needed in a project can be achieved.