Biochar exhibits a great potential to efficiently tackle water organic and heavy metal contaminants considering the wide availability of feedstock, low-cost and favorable physical/chemical surface characteristics. In this paper, the biochar were prepared from peanut shell and its adsorption to Cr6+ and Cu2+ in simulation wastewater are studied. Effects of some factors on absorption properties, such as absorbing time, pH value, dosage of biochar and temperature were investigated. The results show that the time of Cr6+ and Cu2+adsorption equilibrium was 120min. listed The biochar had a good effect on treatment of Cr6+ under the conditions as followed: the dosage of biochar is 4g/L in acid solutions pH from 2 to 5 and temperature is about 30℃ ; The adsorption of Cu2+ increased at pH≥5, the dosage of biochar is 10g/L, and the temperature is about 40℃.Besides, adsorption isotherms on the biochar were simulated with the Langmuir and Freundlich equations, and the adsorption isotherms followed well the Freundlich model, and processes fitted pseudo second-order model. So, the adsorption belongs to the surface chemical adsorption.