The invention discloses a method for evaluating foam regenerating capability. The method comprises the following steps: step a, preparing different concentrations and different types of foaming agent solutions and measuring the corresponding foam volumes and half-life periods of the foaming agent solutions; step b, determining the permeability of a target oil layer according to the original data parameter of a target oil well, and determining the temperature and the pressure of an oil reservoir of the target oil layer according to the actual measurement of the target oil layer; step c, utilizing an oil sand sample of the target oil layer to manufacture a sand filling model, carrying out foam displacement experimental operation on the foaming agent solutions to obtain produced solutions, and measuring the foam volumes and the half-life periods of the produced solutions; step d, comparing and evaluating the foam volumes and the half-life periods of the foaming agent solutions and the foam volumes and the half-life periods of the produced solutions, and determining the best foaming agent which is suitable for the target oil layer. The method can be used in the technical field of yield rate increase through oil well foam displacement. Through the application of the method, foaming agents can be quickly evaluated, and the foaming agent which is most suitable to the oil well can be quickly and efficiently selected for the target oil well.