The invention provides a method and a device for processing a fingerprint image. The method comprises the following steps: a first search algorithm is used for extracting multiple first fingerprint features from the fingerprint image; reverse processing is executed on the fingerprint image to obtain a reverse fingerprint image; and the first search algorithm is used for extracting multiple reference features from the reverse fingerprint image; and in reference of coordinates of the multiple reference features, multiple second fingerprint features are obtained from the fingerprint image.