本文对复分解法制硝酸钠工艺条件进行了试验研究，找到了提高原料利用率和产品质量的适宜工艺条件，对芒硝资源的合理利用具有参考价值。 In this paper, the experimental conditions of the double decomposition of sodium nitrate were explored. The suitable technological conditions for improving the utilization rate of raw materials and the quality of the products were found, which had a reference value for the rational utilization of the thenardite resources.