The invention discloses a method for determining foaming capacity of foamed bitumen. The method is characterized in that: foam energy (FE) of the bitumen is adopted as an evaluation index for determining the foaming capacity of the bitumen. In the prior art, the FE of the bitumen is roughly detected through experience such that large error can be generated. According to the method provided by the present invention, the disadvantage of the prior art is overcome; the method has advantages of simplicity and convenience, easy implementation and precision, and provides a reliable basis for an engineering construction.