Woody orchard wastes have caused tremendous pressure on the environment. In the study, Ficus caricabranch (FB) wastes were recycled and prepared for biochars (FBBs) through pyrolytic technique and the characteristics of FBBs, their Cd2+adsorption behaviors and mechanism in solution were investigated. The FBBs yield, H, N and O contents and hydrophilicity decreased, but the pH, Si, C and ash contents, aromaticity, specific surface area, total pore volume, and stability increased with the increase of pyrolysis temperature. Meanwhile, significant morphological and functional groups changes were observed with increasing pyrolysis temperature. The optimum Cd2+adsorption conditions were pH 6 and dosage of 5 g·L−1. The Cd2+adsorption capacities of all the FBBs were well described by pseudo-second-order and Langmuir isotherm models and the maximum adsorption capacity was 34.85 mg·g−1for FBB800. The adsorption of FBB800 was spontaneous. Moreover, the selective adsorption sequence was in the order of Cd2+> Pb2+> Cu2+> Zn2+. After 5 cycles, the adsorption efficiency could still reach 80%. Precipitation with minerals and surface functional group complexation were the dominant mechanism for Cd2+adsorption. The results indicated that the FBBs could be applied as a low-cost adsorbent to remove Cd2+effectively from aqueous solutions.