According to the problem of soil sourness in the South of China, in a pot experiment, 8 kinds of soil modifier were selected as soil improvement measures. The effects of different soil modifier on the characteristic of sorghum growth、Soil Physical Properties and Soil Chemical Properties was studied. On the basis of the interaction among sorghum, soil and modifier, discussed the mechanism of action of modifier, and revealed variation of the properties of acid soil under the action of modifier. The result indicated that the desulphurization ash modifier and the organic fertilizer had good function to the sorghum growth, Soil bulk density of acid soil which was applying humic acid, the humic acid + lime, XP2, the organic fertilizer and the desulphurization ash modifier, decreased in some degree compared with CK; But results of lime，XP1 and market modifier were opposite. After the Duncan multiple comparisons, there was significant difference between application of modifier ( except for lime treatment) and CK（P<0.05）. The soil pH with XP1 or the lime increased remarkably by 2 units compared with CK, the difference assumes the remarkable level（P＜0.05）. The employment modifier might also alleviate the acid soil aluminum poisonous harm effectively, the laterite, the red laterite lime treatment reduces 18.0%, 18.7%, XP1 processing compared to the comparison to reduce 16.4% separately, 16.0%.
