Fingerprint unlocking method and device

The embodiment of the invention discloses a fingerprint unlocking method and device. The realization of the method is taken as an example, and the method comprises: obtaining an original fingerprint image, and determining the register fingerprint corresponding to the original fingerprint image; obtaining a historical success rate of fingerprint unlocking through comparison of a fingerprint image without feature amplification processing and the register fingerprint; if the historical success rate is higher than a first threshold, using the original fingerprint image to compare with the register fingerprint; and if the historical success rate is lower than a second threshold, performing feature amplification processing of the original fingerprint image to obtain fingerprint simulation data, and then using the fingerprint simulation data to compare to the register fingerprint. The historical success rate is used for determining whether the user's original fingerprint image can be identified or not so as to select more suitable fingerprint unlocking mode; and moreover, in the condition that the user fingerprint identification itself has high success rate, the processing process such as feature amplification and the like can be reduced, and the fingerprint unlocking efficiency can be improved.