The invention discloses a punching device capable of being clamped automatically used for producing lithium batteries. The punching device comprises a loading box; a punching device body is fixedly connected with the rear side of the top of the loading box; and a worktable is arranged on the front side of the punching device body. According to the punching device capable of being clamped automatically used for producing the lithium batteries, by cooperative using of the loading box, the punching device body, the worktable, a supporting plate, an installing plate, a slide rail, a first sliding block, a fixing block, a first connecting rod, a second connecting rod, an opening, a sliding rod, a sliding sleeve, a positioning rod, a pressing block, a division plate, an air cylinder, a first gear plate, a fixing rod, a gear, a second gear plate and a supporting rod, the problem that workpieces to be machined cannot be automatically fixed and clamped during using of an existing punching device is solved; and the punching device capable of being clamped automatically used for producing the lithium batteries has the advantage of automatic clamping, and the fact that working efficiency of a user is reduced due to continuous hand supporting of the user is avoided.