Punching device

A punching device comprises a base, a first slider, a first mould, a second slider, a second mould and a punching power unit. The first slider and the second slider are arranged on the base and respectively slide between a mould opening position and a mould closing position of the base horizontally, the first mould and the second mould are connected and linked with the first slider and the second slider respectively, and the punching power unit is used for driving the first slider and the second slider to slide oppositely and closing or opening the moulds. U-shaped grooves can be punched on horizontal plates by the aid of the punching device, and the punching device can withdraw from the U-shaped grooves, so that the plates can be taken and moved by conveyors such as manipulators and the like.