The automatic beer filling machine is based on the same principle of traditional mechanical isobaric filling valves and uses microcomputer high-precision control to complete the work processes of pressurization, pressure relief, filling, flow control, and waste liquid removal in isobaric filling. During the filling process of the equipment, the filling workflow is automatically controlled throughout the entire process, with accurate wine output, low loss, and low foam volume. It saves a lot of labor costs and improves filling efficiency.