The utility model relates to an intermittent type hydrogenation catalyst safety feeding device. The purpose is that the device that provides not only discharges at the reducible hydrogen of hydrogenation in -process, reduction in production cost, and the coproduction process is safe and reliable more also. Technical scheme is: an intermittent type hydrogenation catalyst safety feeding device which characterized in that: safe feeding device include: concatenate pneumatic switch valve, a hand valve, catalyst tank and the 5th hand valve between the entry of catalyst hopper and hydrogenation cauldron according to the preface, that puts through catalyst tank respectively after parallelly connected through the pipeline puts empty can and pressurization hydrogen air supply, puts through catalyst tank's nitrogen gas air supply through the fourth hand valve and the check valve that concatenate.