The invention discloses an inward pushing directional type rotary steering drilling tool. The tool comprises a hollow outer shell body, a
drill bit seat adjusting structure, a hydraulic driving mechanism and an adjusting mechanism, wherein, the
drill bit seat adjusting structure is arranged in the outer shell body and comprises an adjusting rod, an adjusting ball seat, a supporting ball seat and an adjusting wedge block; the lower end of the adjusting rod is connected with a
drill bit seat, the upper end of the adjusting rod is sleeved with the adjusting ball seat, and the adjusting wedge block is arranged outside the adjusting rod; the adjusting rod can rotate in the circumferential direction, and the supporting ball seat is used for providing a rotating fulcrum for the adjusting rod; the hydraulic driving mechanism comprises a central
pipe, a
servo hydraulic cylinder arranged on the periphery of the central
pipe and a pressure-resistant hose arranged at the bottom end of the central
pipe, and the pressure-resistant hose and the adjusting rod penetrate axially to form a
drilling fluid channel; the bottom end of the
servo hydraulic cylinder drives the adjusting wedge block to axially reciprocate through a pull rod so as to change the bending angle between the
drill bit seat and the outer shell body and the direction of the
drill bit seat; and the adjusting mechanism is used for controlling the axial movement and displacement of the hydraulic driving mechanism. According to the inward pushing directional type rotary steering drilling tool, the deflecting force of a
drill bit can be improved, the stability in the drilling process is improved, and the adjusting process is reliable and stable.