The invention relates to a digital lock phase amplification implementation method and system based on a field programmable gate array. According to the digital lock phase amplification implementation method based on the field programmable gate array, all signals are processed digitally according to the working principles of a lock phase amplifier, then the field programmable gate array is used to implement multiplication, filtering operation and the like. The digital lock phase amplification implementation system based on the field programmable gate array comprises an analog-to-digital converter, a lock phase loop and a field programmable gate array digital processor, wherein the analog-to-digital converter and the lock phase loop are both connected with the field programmable gate array digital processor. The technology provided in the invention is based on the common low-cost field programmable gate array, the low-cost high-speed and high-precision lock phase amplifier is obtained, and quite high practicality is achieved.