Abstract:Bioremediation of saline soil has a persistent and stable effect,it is also beneficial to the conservation of water and soil and ecological balance.The effects of intercropping of legume and chenopodiaceae on soil biological characteristics were studied in saline soil in order to reveal the dominant mechanism of Onobrychis viciaefolia and Atriplex canescens on soil enzyme activity and microbial biomass.The results showed that the soil bacteria and actinomycetes quantities,and available phosphorus content of T3 treatment (1∶1,line) were the highest,i.e.,14.75×103 cfu/g,11.47×102 cfu/g and 27.28 mg/kg,respectively on average.Soil enzyme activities of dehydrogenase and alkaline phosphatase of T4 treatment (2∶2,line) were the lowest,i.e.,0.36 g/(g·24 h),and 0.80 mg/(g·24 h),respectively on average.However,bacteria quantity,available phosphorus and potassium contents of T2 treatment (Atriplex canescens only) were the lowest,i.e.,9.76 (×103) cfu/g,19.77 mg/kg and 54.42 mg/kg,respectively on average.The grey relation analysis showed that the soil improvement of T3 treatment was the best,followed by T2 treatment.