The invention discloses a cutting die for a piano cover plate. The cutting die for the piano cover plate comprises a stand column, an extrusion spring, a worktable, a through hole and an air suction fan. A connecting plate is installed on the inner side of the stand column, a placing piece is fixed to the upper portion of the connecting plate, a connecting rod is connected to the upper portion ofa first motor, a limiting plate is connected to the upper portion the connecting rod, the extrusion spring is installed inside a fixed block, an extrusion plate is fixed to the outer side of the extrusion spring, and the worktable is arranged above the connecting plate. A second motor is arranged in the worktable. The lower portion of the second motor is connected with a slide board, and the upperportion of the second motor is connected with a hydraulic rod. The suction fan is installed above the worktable, and a storage chamber is installed above the suction fan. The cutting die for the piano cover plate solves the problems that the production efficiency of the cover plate is reduced due to the fact that the cover plate is inconveniently to fix and more dust is generated during cutting by an existing cutting die for the piano cover plate.