A novel double-spring mechanical optical axis key comprises an upper cover, a guide core, a compression sounding spring, a firing pin, a reset spring and a base. The device is characterized in that achannel hole conforming to the outline of the guide core is formed in the center of the upper cover, the guide core is inserted into the channel hole of the upper cover from below, a circular shaft isarranged below the interior of the guide core, one end of the compression sounding spring is sleeved with the circular shaft, and the other end of the compression sounding spring is connected with astriker; reset springs sleeve the lower ends of the guide cores; the bottom of the reset spring is limited by the base internal structure; shaft hole in center of base, the lower part of the striker is inserted into the base shaft hole; part of the striker extends out of the bottom of the base; the optical axis keys are installed on the keyboard substrate, structural redundancy is arranged in thekey base and used for installing the optical axis sensor, the guide core moves up and down by compressing the sound production spring, the firing pin and the reset spring under the action of pressure,and meanwhile the firing pin structure moves up and down instantly to knock the guide core structure so that specific sound can be made.