This machine is applied to duplicate the working master plate of holographic nickel plate. Mounting the original master onto the plate rack, to be replicated in the electrolytic solution, time setting and current increase & decrease according to the size of master plate.This machine consists of hard PVC made tank, high-frequency impulse, centrifugal filter, heater, positive pole, Ti-alloy positive pole, relay and digital display, which result in a quick and high fidelity of master duplicate.