Automatic fire extinguishing device of spark machine

An automatic fire extinguishing device of an electric discharge machine comprises an electric discharge machine machining platform, two sliding grooves are formed in the front side of the top of the electric discharge machine machining platform, a positioning plate is movably connected to the front side of the left side of the top of the electric discharge machine machining platform, a rotating disc is fixedly connected to the top of the positioning plate, and a fixing plate is fixedly connected to the top of the rotating disc; a fire extinguishing mechanism is fixedly connected to the front side of the left side of the top of the fixing plate and comprises a water tank, a pressure water pump and a second water outlet pipe, sliding blocks are movably connected to inner cavities of two sliding grooves, the tops of the two sliding blocks are fixedly connected with a positioning plate, and the bottom of the water tank is fixedly connected with the fixing plate. The left side of the top of the water tank communic