The main body of the underground sewage treatment equipment is buried below ground, and with the noise reduction and vibration reduction measures incorporated into the equipment itself, the noise generated during operation is effectively isolated and diminished. For instance, the main noise sources within the equipment, such as the pumps and aeration devices, operate in an enclosed underground environment. The sound produced is absorbed and isolated by the soil layer, resulting in a significant reduction in the volume of noise that reaches the ground surface.