Abstract: Thermal treatment represents a promising technology for removing organic pollutants from waste salt. In view of the organic residues from 2,4-dichlorophenoxyacetic acid pesticide waste salts and by using recrystallization to prepare simulated waste salt, the effects of organic concentrations, organic compositions, inorganic salt compositions, and atmospheres on thermal removal of organic substances were investigated from the perspectives of kinetics and organic transformation pathways. The effects of reaction temperature and time on organic removal were also explored via a fluidized bed experiment. The results showed that sodium substituted 2,4-dichlorophenoxyacetic acid sodium tended to decompose at higher temperatures than 2,4-dichlorophenoxyacetic acid and 4-chlorophenoxyacetic acid. When the concentration of organic matter was 5%, the apparent activation energy of organic matter removal was the lowest. NaCl in waste salt performed potential catalytic behavior to facilitate the thermal degradation of organics, while Na₂SO₄ revealed a higher reaction energy barrier. Additionally, the thermal removal process of organic matter from waste salt involved the thermal decomposition of organic substances and the volatilization of undecomposed organics. Specifically, organic matter was easily carbonized in nitrogen, while carbonization and oxidation occurred in air. The results of the fluidized bed experiments for thermal removal showed that the reaction temperature and atmosphere were the leading factors influencing the removal performance, with the removal efficiency of organic matter achieving 96.79% at 600 ℃ in air atmosphere.