Inclined block self-locking type offset mechanism and rotary steering tool device

The invention relates to the technical field of oil exploration well logging, and particularly discloses an inclined block self-locking type offset mechanism and a rotary steering tool device.A backup plate is provided with a reset unit enabling the backup plate to be kept in a retracted state and a push-out unit enabling the backup plate to stretch out, and the push-out unit comprises a push inclined block and a plunger; the pushing inclined block is driven by a lead screw nut transmission device to move in a reciprocating mode in the direction perpendicular to the moving direction of the backup plate, and the plunger is arranged in the moving direction of the backup plate and axially moves under the action of the inclined face of the pushing inclined block. By means of the lead screw nut transmission device and the inclined block, stretching and retracting of the offset structure are achieved, offset drilling of the rotary steering drilling tool is achieved, the inclined block form is adopted, the self-lock