Quantitative filling method

The invention provides a quantitative filling method for barreled water, which comprises the following steps: (1) filling with large flow rate and high speed: first, conveying liquid to a filling barrel through a filling pump, filling fast into a bucket from the filling barrel through a filling pipeline, and detecting filling quantity through a flowmeter; (2), filling accurately: adjusting an automatic valve on the filling pipeline automatically through a signal device when the flowmeter detects that the filling quantity approaches to a set value, so as to reduce the flow rate, and measuring the filling quantity through the flowmeter; and (3) stopping filling when the total filling quantity of the step (1) and the step (2) reaches a set value. The method has the benefits that quantitative control can be realized; the water resource is saved; the filling speed and the yield are high; the quantitative filling is accurate; the average precision of industrial production can reach 0.2 percent; the structure and the control are simple; and the limitation of a pipeline is avoided.