The invention relates to a method for simultaneous turbidity removing and filling of a urea ammonium nitrate solution. According to the method, a urea ammonium nitrate solution filling system is adopted. The system comprises a turbidity removing device, a storage tank, a filtering tank, a conveying pump and a filling hose, wherein the storage tank, the filtering tank, the conveying pump and the filling hose communicate in sequence through pipelines. The filling hose is connected to an inlet short pipe of the turbidity removing device; a filling valve and a flow meter are further installed on the pipeline between the conveying pump and the filling hose; the conveying pump and the filtering tank further communicate through a backflow pipeline; and a pressure gauge and a backflow valve are installed on the backflow pipeline. In the filling process, the flow-integrating value of the flow meter is set, the flow meter is interlocked with a power source switch of the conveying pump, and when the flow-integrating value of the flow meter reaches the set flow-integrating value, the switch of the conveying pump is switched off, so that the accident of filled-tank overflowing caused by desertion of an operator is prevented; and the high-limit pressure value of the pressure gauge is set, the pressure gauge is interlocked with the power source switch of the conveying pump, and when the pressure of the pressure gauge reaches the set high-limit pressure value, the switch of the conveying pump is switched off, so that the burst-open accident of a filter bag due to the large resistance is prevented.