USB (Universal Serial Bus) key with fingerprint identifying function

The utility model relates to a USB (Universal Serial Bus) key with a fingerprint identifying function. The USB key comprises a fingerprint sensor and a CPU (Central Processing Unit), wherein the fingerprint sensor is connected with the CPU; the CPU is connected with a host computer; the CPU comprises a command analyzing unit and a command executing unit; the command analyzing unit is connected with the host computer and the command executing unit respectively; and the command executing unit is connected with the fingerprint sensor and the command analyzing unit respectively. In the USB key, user fingerprint template data, a certificate and a key are saved inside the USB key, fingerprint comparison is realized inside the USB key and is independent of the host computer, and the security of data is ensured; and meanwhile, the communication between the USB key and the host computer is performed in the form of a cipher text, and encryption and decryption can be realized inside the USB key, so that the security of information transmission is ensured.