Two variable charge soils and one acid constant charge soil were chosen to investigate the effect of salicylic acid on migration of Al with leaching experiment. The results showed that the different soils had different adsorption capacity for salicylic acid due to the difference in soil mineral compositions, and thus the effect of salicylic acid on the migration of Al in different soils was different. The Ferralosols with high content of free iron oxides has the great adsorption capacity for salicylic acid and thus small promotion of the acid on migration of Al was observed in this soil. The content of free iron oxides in Ferrosols was lower than that in Ferralosols, the adsorption capacity for salicylic acid in the former was also smaller than that in the latter. Therefore at the earlier stage of leaching experiment, the effect of salicylic acid on migration of Al was small, but the great promotion was observed in the soil at the latter stage of leaching experiment, especially at high initial concentration of salicylic acid. The Argosols has small adsorption capacity for salicylic acid, the organic acid showed obvious promotion on Al migration in the soil at high initial concentration of the acid after the start of leaching experiment. The results also indicated that the migration of Al was also related to the pH of soil systems. Low pH promoted the dissolution of Al and the migration of Al in soils as well.