Water expansion machine clamping device capable of simultaneously producing multiple pipes

The utility model relates to the technical field of water expansion machines, and provides a water expansion machine clamping device capable of producing multiple pipes simultaneously, which is convenient for automatic feeding and comprises a water expansion machine body, the front end of the water expansion machine body is fixedly connected with a fixed plate, and the top end of the fixed plate is slidably connected with a movable plate. A driving mechanism used for driving the moving plate to move is connected to the fixed plate, an electric cylinder is mounted at the top end of the moving plate through a mounting frame, a feeding plate is fixedly connected to the output end of the electric cylinder, two annular mounting frames are slidably connected to the top end of the feeding plate, and three air cylinders are mounted on the annular mounting frames; the three air cylinders are circumferentially distributed on the periphery of the annular mounting frames at equal intervals, the output ends of the air cyl