Nitrification inhibitors can increase N fertilizer use efficiency and decrease the potential N pollution. Incubation experiment was conducted in sandy and clay calcareous soils incubated in growth chamber at 25°C in dark condition in order to compare the effect of three different types of nitrification inhibitors (NI), namely, dicyandiamide (DCD), 3, 4-dimethylpyrazole phosphate (DMPP) and Nitrapyrin on (NH4)2SO4 nitrification inhabitation. During 30 days incubation tine, an obvious nitrification inhibitions were observed after nitrification inhibitors applied, soil NH4+-N contents were improved by 228.45 - 244.85 mg/kg and 209.75 – 254.79 mg/kg in sandy and clay soil respectively, while soil NO3--N contents were reduced by 93.85% - 94.99% and 91.82% - 95.38% in sandy soil and clay soil respectively. Significant nitrifications were occurred, soil apparent nitrification rates under control condition (CK) were increased by 86.00% and 80.89% while were only improved by 1.28% - 2.09% and 2.72% - 8.40% in sandy soil and clay soil respectively after nitrification inhibitors added. From above results the conclusion can be made that DCD, DMPP and Nitrapyrin all three nitrification inhibitors exert an obviously nitrification inhibition effect, nitrification rate in sandy soil were higher than that in clay soil, the order of inhibition effects were as follow: DMPP＞Nitrapyrin＞DCD.