This paper presented an embedded system based on dual-core architecture to solve the contradiction between high performance and low power consumption of today fingerprint lock. TI's AM437x high-performance processor was used to transplant identification algorithm, with AVR microcontroller MEGA8 microcontroller of ultra-low power as a master chip to control non-contact start, infrared light, motor drive and other peripherals to ensure that the system has a lower standby power consumption. By setting the ultra-low power sleep mode of the master chip, the system is in a low power state for most of the time, and the non-contact start-up module controls the high power consumption identification module to power up only when it is needed, thus greatly reducing the power consumption. Comprehensive test shows that the static operating current is as low as 1.51 μA when the system is in sleep mode, while the wake-up current is optimized to 3.3 mA. The maximum system life of six dry cells is 638 days. Compared with the existing design methods, the system has both lower power consumption and higher performance.