本文将动力学介质效应的定标粒子理论应用于电解质溶液中的扩散,结合考虑扩散过程的机理,导出了扩散系数的表达式.对CH_4、CO_2、CH_3COCH_3、HTO和H_2O在电解质溶液中的扩散、示踪或自扩散系数的计算表明,纯水中分子跃迁的平均距离与电解质溶液中跃迁的平均距离之比与电解质的水化数及其浓度相关.根据这一关系,可以满意地预测电解质溶液中分子的扩散系数. In this paper, the scaling particle theory of kinetic medium effect is applied to the diffusion in electrolyte solution. The diffusion coefficient expression is derived in consideration of the mechanism of diffusion process. The diffusion of CH_4, CO_2, CH_3COCH_3, HTO and H_2O in electrolyte solution , The calculation of the tracer or self-diffusion coefficient shows that the ratio of the average molecular transition distance in pure water to the average distance of transition in the electrolyte solution is related to the hydration number of the electrolyte and its concentration. From this relationship, it is possible to satisfactorily predict the electrolyte Diffusion coefficient of molecules in solution.