Abstract: 【Abstract】Agricultural and forestry wastes were used as the main biomass source for humus compost fermentation，and the composition of different humus and their adsorption effects on benzene series were analyzed to find efficient humus materials suitable for remediating benzene series pollution at coal chemical industry sites in northwestern China，and provide reference for treating pollution of benzene series by biological methods.【Method】Apple wood branches and pig manure were selected as the main biomass sources. Three treatment groups were set up：pure apple wood branches，pure pig manure，and a mixture of apple wood branches and pig manure. Aerobic composting，with a carbonto-nitrogen ratio of 25∶1，was used for a fermentation period of 90 d. The organic carbon contents of water-soluble substances，humic acid，humin and fulvic acid（referred to as C_WSS，C_HE，C_Hu，and C_HA respectively）were determined in the obtained humus. The organic carbon content of fulvic acid（C_FA）was calculated，and the applicability of different biomass source materials was assessed through screening their adsorption effects on benzene series.【Result】During the composting period，the consumption and formation of humic substances varied among different treatment groups. At the beginning of composting（0 d），the highest contents of C_WSS，C_HE，and C_HA were observed in the pure pig manure group，measuring 28.1，54.0，and 32.0 g/kg respectively，while the lowest were found in the pure fruit tree branch group，with values of 15.5，48.0，and 24.0 g/kg respectively. The highest C_Hu content was observed in the pure fruit tree branch group（369.5 g/kg），while the lowest was found in the mixed group of fruit tree branches and pig manure（169.0 g/kg）. The difference between the 2 groups was significant（P<0.05，the same below）. The highest C_HA/C_FA ratio was observed in the mixed group of fruit tree branches and pig manure（2.67），while the lowest ratio was found in the pure fruit tree branch group （1.00），indicating a significant difference between the two. At the end of the composting process（90 d），the ranking of some indicators in the treatment groups changed. The highest C_WSS content was observed in the mixed group of fruit tree branches and pig manure（12.6 g/kg），while the lowest was found in the pure pig manure group（9.1 g/kg），indicating a significant difference between the two. The highest and lowest contents of C_HA were found in the pure fruit tree branch group（22.1 g/kg）and the mixed group of fruit tree branches and pig manure（15.0 g/kg）respectively，showing a significant difference between the two. The highest and lowest C_HA/C_FA ratios were observed in the pure fruit tree branch group （1.56）and the mixed group of fruit tree branches and pig manure（0.83）respectively，indicating a significant difference between the two. The screening，based on the adsorption effect of benzene series，revealed that humus prepared from pure fruit tree branches exhibited the best adsorption performance for benzene series，with an adsorption capacity of 320 mg/kg. 【Conclusion】The humus prepared from composting fruit tree branches exhibits superior adsorption properties for benzene series and has the potential to serve as an effective material for remediating benzene series contaminated sites in the coal chemical industry in the northwestern region.