The utility model discloses a well cellar water flushing puncher, belongs to the technical field of agricultural machinery, and overcomes the defects of high labor intensity of tobacco growers, low well cellar forming efficiency and poor well cellar quality in the well cellar forming process in the prior art. The device mainly comprises two well cellar manufacturing units, each well cellar manufacturing unit comprises an inserting rod, a drill bit is installed at the bottom of each inserting rod, a water flow switch is installed at the top of each inserting rod, a distance fixing device is installed on the lower side of each inserting rod, and the two well cellar manufacturing units are connected with a flow dividing pipe through connecting rods. The well cellar forming device is used forwell cellar forming during flue-cured tobacco planting.