The invention discloses a punching device facilitating punching position adjustment and used for producing a metal product. The punching device comprises a workbench, air cylinders are fixedly connected to the two sides of the top of the workbench, a slide rod is fixedly connected to the tops of the air cylinders, a sliding sleeve is slidably connected to the surface of the slide rod, a shell is fixedly connected to the top of the sliding sleeve, a sliding rod is fixedly connected to the left side of the top of the inner wall of the shell, and the right side of the sliding rod is fixedly connected with the right side of the inner wall of the shell. According to the punching device, the slide rod, the sliding sleeve, the shell, the sliding rod, the sliding sleeve, a fixing plate, a connecting plate, a connecting column, a transmission plate, a communicating groove, a lifting plate, a positioning plate and positioning grooves are arranged, so that the sliding sleeve can be fixed while the sliding sleeve moves on the surface of the slide rod, and the problem that the existing punching device cannot adjust the punching position, manual moving of the metal product is needed, so that thelabor force of workers is increased, and a large amount of time is wasted is solved.