Soil adsorption of dissolved organic carbon (DOC) has an important effect on the cycling and transformation of soil organic carbon. In order to make clear the soil adsorption law of DOC in the natural saline-alkali paddy fields, 5 paddy fields (P1, P2, P3, P4 and P5) with different saline-alkali degrees in Western Jilin Province were sampled and incubated in the lab for 70 days in a stationary condition. The experiment studied the DOC adsorption characteristics under different solution concentrations and analyzed the effects of physical and chemical properties on DOC maximum cumulative adsorptions. The results showed that the soil adsorption rate was large in earlier period while decreased with time, which could be described by the Elovich equation suitable to DOC adsorption under different solution concentrations. The Freundlich equation, was best fitted with DOC isometric adsorption features, from which the coefficients indicated that adsorption capacity of soils significantly differed from each other and the adsorption capacity of surface soil was greater than the bottom layer. Exchangeable sodium percentage and pH significantly affected DOC maximum cumulative adsorption which increased with the increased content of clay and organic matter. This study was crucial to elucidate the cycling and transformation of DOC on saline-alkali paddy fields.