Abstract: The waste printer outer covering was taken as a typical e-waste, and commercial humic acid was used as the extractant. Leaching tests were adopted to study the leaching characteristics of polybrominated diphenyl ethers (PBDEs) in waste printer outer parts on their different waste particle sizes, DOC concentration of extractant, pH, extraction time and liquid to solid ratio, which related with two disposal ways, simply landfill or disposed of with household waste. Soxhlet extraction and liquid-liquid extraction were applied to exact the PBDEs in the waste printer outer covering, and subsequently GC-MS was used to measure the eleven PBDEs for both qualitative and quantitative detection. The result showed that BDE28, BDE47, BDE66, BDE85, BDE99, BDE100, BDE153and BDE154were detected in the waste printer outer covering, while for leachate, only BDE28, BDE47, BDE66, BDE85, BDE99, BDE153were detected, with the leaching rates of ∑₆PBDEs from 0.04% to 0.44%. The result indicated that DOM from leachate of landfill and soil solution can enhanced the leachate of PBDEs from the waste printer outer covering. With the increasing of DOC concentrations, the leaching amounts of PBDEs increased. It further suggested that leachate of PBDEs under acid conditions were lower than that under the neutral condition, and the leaching of PBDEs gradually increased with the leaching time prolonged, however, none of a liquid-solid system equilibration time had been obtained during the 480h set in experiment. The results presented that the leachate of PBDES was a slow releasing process.