Abstract: Soil incubation experiment and rice-growing pot experiment were conducted to investigate the changes of soil pH, exchangeable calcium and magnesium, and available phosphorus in the treatments of the non-amendment (CK) and the amendments of quicklime (Q), dolomite powder (DP), calcium magnesium phosphate (CMP) and four soil modifiers of No.1 (M1), No.2 (M2), No.3 (M3) and No.4 (M4) in acid paddy soils. The results of the incubation experiment showed that all treatments increased soil pH compared with CK (P <0.05); Q, DP and M2 increased the soil exchangeable calcium significantly (P <0.05); DP, M2, M3 and M4 improved the soil exchangeable magnesium significantly (P <0.05); and M1, M3 and M4 reduced the soil available phosphorus significantly(P <0.05). To compare with incubation experiment, the results of the pot experiment showed that the soil modifiers improved soil pH, exchangeable calcium and magnesium, and available phosphorus better than in the incubation experiment. Except for the M3 treatment with the soil exchangeable calcium decreasing by 4.9%, all other amendment treatments increased the soil exchangeable calcium, and the most increased by 20.9%. In addition to DP increased by 14.9%, the others’ exchange magnesium contents were all decreased, to reduce the most was the M2 treatment by 9.2%. All treatments’ available phosphorus contents were increased, the most increased by 114.6% and was M2 treatment. Our collective experimental data suggested that the soil modifiers can affect soil pH, exchangeable calcium and magnesium, and available phosphorus of the acid paddy soils for the short term and they performed differently in the incubation and pot experiments.