Water filling device

The utility model relates to a water filling device for soil transport pipelines. A water pump is driven by one set of motor to supply water, an outlet of the pump is connected with a safety valve which is provided with a flow distributing device, and a flow distributing water channel is connected with a throttle valve, and led to a water tank. A check valve is connected to the inlet point of the safety valve entering a transport pipeline, and the outlet point of the safety valve is simultaneously connected with a pressure meter and a pressure sensor, and connected with a water filler which is arranged on the transport pipeline through the check valve. The utility model fills water to mud within certain distance of the transport pipeline, the flowability of the mud in the transport pipeline is increased, and water film which has lubricating effect is simultaneously formed on the inner wall of the pipeline. Thereby, the flow resistance of the mud is reduced.