Based on the structural analysis principle, different boundary conditions forming different nature faults in the same stress field, indicate that the Hailar Basin is controlled by the SSE-NNW direction extensional stress field, forms NNE and NEE trending faults, and NNE trending faults express strike-slip deformation evident. Extensional stress field orientation adjusted to nearly EW direction, nearly SN trending faults formed, and NNE, NEE and SN trending faults twisted deformation in the stage of rift-depression transformation in Hailar Basin. The basin returned during the end of Yimin formation, emerged levorotation pressure torsion deformation controlled by nearly EW compressive stress field, and NNE and NEE trending faults inversed strong. Basis for fault deformation characteristics superposition relationship, there are 4 sets of fault systems in Hailar Basin: early extension faults, interim tensile shearing faults, early extension and interim tensile shearing faults and early extension, interim tensile shearing and late reversal faults. The early extension and interim tensile shearing reverse faults form fault sheltered traps, the uplifts within depression and slopes are cut and crushed into fault complication anticline traps, and the early extension faults and interim tensile shearing faults cross combination and form complex fault block traps in rift structure layer. The early extension, interim tensile shearing and late reversal faults, appearing \"comb-like\" composition, form typical fault block traps in the rift-depression structure layer. Based on the fault activity and accumulation period coupling relation and anatomy results of typical oil and gas reservoirs, concludes that the early extension faults and early extension and interim tensile shearing faults play sheltered faults at a critical accumulation time with the sealing hydrocarbon column height generally less than the traps amplitude, as well as early extension and interim tensile shearing and late reversal faults are adjustment faults. On the base of the analysis on trap style, the faults role of reservoir-forming and transporting system, fault controlling reservoir modes are divided into 2 types and 4 kinds in Hailar Basin. 2 types include primary and secondary reservoir and primary reservoir including three kinds: The first is oil and gas lateral migration in hydrocarbon kitchen margin and reverse fault sheltered reservoir-forming model, and reservoir-controlling fault is early extension and interim tensile shearing fault system; second model is oil and gas primary migration in the inside hydrocarbon kitchen and fault sheltered \"in the box\" reservoir-forming model; third is oil and gas lateral migration of uplifts within depression in the inside hydrocarbon kitchen, \"diffuse type\" reservoir-forming model. Both of models reservoir-controlling fault is the early extension fault. Secondary reservoir is the \"umbrella-shaped\" reservoir-forming model of oil and gas vertical migration along fault, the early extension and interim tensile shearing and late reversal fault system as reservoir-controlling fault.