To assess the contamination risk of heavy metals, it is necessary to base on the concentrations of their chemical forms. Topsoil samples in the dumping site and fields located near the dumping site of the Pb/Zn mine at Hich village, in Thai Nguyen province, were collected to analyze the total concentration and chemical form of Cr in soil samples. Five chemical fractions of Cr in soil were extracted according to the Tessier sequential extraction procedure, and the concentration of Cr was analyzed by inductive plasma mass spectrometry (ICP-MS). The results showed that Cr existed in the tailing sample in the sequence of residual fraction (F5) > carbonate fraction (F2) > Fe/Mn oxide fraction (F3) > organic matter bound fraction (F4) > exchangeable fraction (F1), while for farming soil samples, Cr was mainly distributed in the order F2 > F5 > F3 > F4 > F1. According to the ICF index, the Cr concentration in the tailing samples was below low risk, while the field soil samples were mainly at low and high-risk levels. According to the RAC code, most of the tailing soil samples had low-risk RAC values, while almost farmland samples had high-risk and very high-risk RAC values.