Removal of organic pollutants in high COD industrial waste salt by carbonization was studied，and the purification of waste salt was realized.The effects of carbonization atmosphere，carbonization reaction temperature，reaction time，material layer thickness and waste salt moisture content on the removal of organics and the morphology of carbonized salts were investigated.When raw waste salt was with water soluble COD of 6 680 mg/kg and water content of 0.85%，the orthogonal experiment results showed that the carbonization temperature had a higher significant value for the removal of carbonized organics than the carbonization reaction time，carbonization atmosphere and material layer thickness.The results of single factor experiment showed that the average residual amount of water-soluble COD was 87.36 mg/kg，and the removal rate could reach more than 98% under the conditions of air atmosphere，carbonization temperature of 575 ℃，thickness of 25 mm，and carbonization time of 1 h.At the same time，the chromaticity value of 20% salt solution was reduced from 975.4 to 13.5，and the sodium sulfate product obtained through purification and refining met the class I first grade standard of Industrial Anhydrous Sodium Sulfate（GB/T 6009—2014）.