Cr(VI) is higher than Cr(III) in toxicity and mobility in soils. Therefore the oxidation of Cr(III) increase the environmental risk to soils. This study selected 22 soils from 6 counties in Taiwan, total 42 soils which were spiked 100 mg/kg Cr(III) and Cr(VI) to be simulated the soil contaminated by chromium. During 49 days of soil incubation, the soil samples were collected at 7 day interval to determine the concentration of exchangeable Cr(VI) for exploring the relationship between soil properties and Cr form. The results indicated that after adding Cr(VI) into the soils, most of them have the ability to restore Cr(VI), while reducing power was mainly influenced by OM, DOM and MBC contents. In the addition of Cr(III), Mnd was the main oxidation agent of Cr(III). However, only a few soils had the potential of Cr(III) oxidation, and the oxidation potential was weak. By using correlation analysis, Cr(VI) reduction rate was negatively correlated with the soil pH, Mnd but was positively correlated with OM, DOM, CEC and MBC. An empirical model has been established to predict reduction capacity of Cr(VI) in the soils: K = 0.202 + 0.090 DOM -1.381 Mnd +0.187 MBC -0.022 OM (R2= 0.76, P<0.05).