Universal carton sealing machine

The utility model discloses a universal carton sealing machine which comprises a carton sealing machine body, a vertical plate is fixedly connected to the top of the back face of the carton sealing machine body, a top plate is connected to the top of the vertical plate, baffles are fixedly connected to the two sides of the top end of the carton sealing machine body, an electric telescopic rod is installed in the middle of one side of each baffle, and the output end of each electric telescopic rod is connected with a limiting mechanism. The limiting mechanism comprises a fixing frame, a rotating rod and a limiting roller, negative pressure shells are installed on the two sides of the top of the box sealing machine body, a supporting plate is connected to the bottom of the back face of the vertical plate, an equipment box is connected to the back face of the supporting plate, and a negative pressure fan is installed in the equipment box. The box sealing work is prevented from being affected by displacement in t