According to actual needs, various specifications of single-hole water distributors can be established in small and medium-sized towns. Based on the size of urban drainage, demonstration applications of new single-hole controllable water distributors are implemented. This not only improves the purification efficiency of sewage in small and medium-sized towns but also reduces labor intensity and increases production efficiency, making it a valuable practical application. The new controllable water distributor invented in this achievement mainly consists of two structural components: a central rotating crossbeam and a controllable water distribution crossbeam with a rotating outlet hole. The sewage pipe is connected to the rotating crossbeam, and the central rotating crossbeam and the controllable water distribution crossbeam are linked together for water distribution. The result has been demonstrated in the World Expo Park, where the actual water distribution effect is reliable and the efficiency of water distribution has been improved. Utilizing the purification function of biological filters, the aim is to efficiently and reliably treat small and medium-sized town sewage through systematic networking, achieving a virtuous cycle of water resources and multi-level, multi-channel utilization of resources. Improve and protect local water resources and ecological environment. Since the core components of the fully automatic uniform water distribution control method of this invention are relatively universal microcontroller control units, stepper motors, and other general-purpose electronic components, the design, manufacturing, installation, and maintenance costs of the new single-hole controllable water distributor are low, the operation and implementation are simple, it can save materials, and is beneficial to the treatment of domestic sewage and agricultural wastewater.