Automatic tool changing device of electric spark machine tool

The utility model discloses an electric spark machine tool automatic tool changing device which comprises a supporting table, the left side of the top of the supporting table is fixedly connected with a supporting block, the top of the supporting block is fixedly connected with a box body, the left side of the box body is fixedly connected with a first motor, and an output shaft of the first motor is fixedly connected with a hydraulic rod. And the hydraulic rod penetrates through an inner cavity of the box body and is fixedly connected with a clamping mechanism, the surface of the hydraulic rod is sleeved with a bearing, and the side, close to the box body, of the bearing is fixedly connected with the box body. Through cooperative use of the supporting table, the supporting block, the box body, the first motor, the hydraulic rod, the clamping mechanism, the bearing, the rotating disc, the cutter, the groove and the fixing mechanism, the problem that an electrode clamp of an existing electric spark machine too