The invention discloses a valve fastening device and belongs to the field of fastening devices for mechanical workpieces. The valve fastening device comprises a push rod, a vertical rod and a handle.One end of the vertical rod is provided with a shaft pin connection device and a U-shaped groove, and the U-shaped groove is provided with an angle clamping piece. The push rod is rotatably connectedwith the vertical rod, and the other end of the vertical rod is fixedly connected with the handle. By means of the valve fastening device provided by the invention, the problem that a valve parallel to a checkered iron plate is difficult to switch on and switch off is solved, and the valve fastening device has the characteristics of being convenient to carry and store, convenient to construct andthe like.