The water filling machine integrates the functions of washing, filling, and capping into one machine, achieving automation throughout the entire process. Suitable for polyester bottles and plastic bottles. The filling method adopts a new type of atmospheric pressure filling, which makes the filling speed faster and more stable. Therefore, compared with machines of the same specifications, this machine has a higher output and greater efficiency. This machine adopts advanced programmable logic controller (PLC) to control the automatic operation of the machine. The bottle feeding chain is adjusted by a frequency converter, which cooperates with the host frequency converter to make the bottle feeding operation more stable and reliable. The operation status of each component is detected by photoelectric detection. High degree of automation and easy operation.