The utility model discloses a preventer gate direction supports sliding sleeve subassembly, preventer, plays oil pipe's equipment down belongs to oil pipe's the equipment down that rises among the oil gas drilling equipment technical field, and its aim at provides the preventer gate direction that can make the gate steadily open, close and supports sliding sleeve subassembly, preventer and play oil pipe's equipment down. It includes the slip cap, the both ends of slip cap are connected with cylinder assembly, the intermediate flange of preventer respectively, the slip cap endotheca is equipped with the direction back shaft, the axial displacement of slip cap can be followed to the direction back shaft in the slip cap, after passing intermediate flange, the one end tip that is close to the preventer casing of preventer of direction back shaft is connected with the flashboard of preventer. The utility model is suitable for a be used for in the preventer gate direction support sliding sleeve subassembly, be equipped with the preventer of this supports sliding sleeve subassembly and play time oil pipe's equipment.