NOVELTY - An ammonium chloride sewage is treated and recycled by preheating ammonium chloride sewage; and carrying out triple effect evaporation on material liquid by a plate evaporator. The first effect evaporation comprises using live steam at 0.15-0.8 MPa as heating medium. Pressure of the first effect separation chamber is controlled at 0-0.05 MPa, while its temperature is controlled at 110-120 degrees C. A mass percentage concentration of ammonium chloride in the liquid after gas-liquid separation is controlled to be less than or equal to 25%.    USE - Method for treating and recycling ammonium chloride sewage (claimed) useful as fertilizer.    ADVANTAGE - The method reduces steam consumption and operation cost.    DETAILED DESCRIPTION - Treating and recycling ammonium chloride sewage comprises preheating ammonium chloride sewage; and carrying out triple effect evaporation on material liquid by a plate evaporator. The first effect evaporation comprises using live steam at 0.15-0.8 MPa as heating medium. The pressure of the first effect separation chamber is controlled at 0-0.05 MPa, while its temperature is controlled at 110-120 degrees C. A mass percentage concentration of ammonium chloride in the liquid after gas-liquid separation is controlled to be less than or equal to 25%. The separated liquid enters a second effect plate evaporator for the second effect evaporation and circulates between the first effect separation chamber and the second effect plate evaporator. The gas separated and the first effect heating steam after heat exchange serve as the heat dissipation media of the second effect evaporation. Pressure of the second effect separation chamber is controlled at 0.02-0.03 MPa less than that of the first effect separation chamber, while its temperature is controlled at 15-25 degrees C lower than that of the first effect separation chamber. A mass percentage concentration of the ammonium chloride in the liquid after gas-liquid separation is controlled to be less than or equal to 35%. The separated liquid enters a third effect plate evaporator for the third effect evaporation and circulates between the second effect separation chamber and the third effect plate evaporator. The gas separated and the second effect heating steam after heat exchange serve as the heat dissipation media of the third effect evaporation. Pressure of the third effect separation chamber is controlled to be 0.02-0.03 MPa less than that of the second effect separation chamber, while its temperature is controlled at 15-25 degrees C lower than that of the second effect separation chamber. A mass percentage concentration of ammonium chloride in the liquid after gas-liquid separation is controlled to be 36-38%. The separated gas and third effect heating steam after heat exchange serve as the heat dissipation media for preheating the ammonium chloride sewage.