The remediation effects of petroleum degrading microbial consortium on medium level petroleum contaminated soil from North China was studied through exogenous petroleum degrading microbial consortiums screening and laboratory simulation of phyto-microbial remediation. The results indicated:TPH degrading efficiency of PDC-3 microbial consortium was 84.07%，which was the highest among the four microbial consortiums screened. In the laboratory remediation simulation，after 120 d，PDC-3 phyto-microbial treatments achieved better remediation effects than that of PDC-3 treatment alone. The TPH degrading efficiencies of PDC-3 with Lolium perenne L. planting and PDC-3 with Medicago sativa L.planting were 91.58% and 89.30% respectively，and the soil TPH were both reduced to lower than 500 mg/kg. Moreover，PDC-3 with L. perenne planting reached up to 89.32% TPH degrading efficiency in 90 d，and required shorter remediation period than that of PDC-3 with M. sativa planting. Furthermore，PDC-3 was the major factor in soil TPH degrading process，its TPH degrading contribution rate was much higher than that of endogenous microbial consortiums or plants；Plants contributed up to 4.09%～6.48% of the soil TPH degraded，and it functioned mostly in the late stage of the remediation process. Meanwhile，PDC-3 microbial consortium effectively removed 85.14%～100.00% C10～C12 and C22～C40 petroleum hydrocarbons in 120 d when used alone as well as in phyto-microbial remediation. However，the C13～C21 petroleum hydrocarbons showed a temporary accumulation effect. At last，soil pH and fertility were improved during phyto-microbial remediation using PDC-3，which would be important for soil function restoration.