The invention discloses a hydraulic swing driver for a narrow space integrating position sensor. According to the main composition of the hydraulic swing driver, the open end of an oil tank is connected with a valve block; a servo motor and a small axial piston pump are arranged in the oil tank; two hydraulic cylinders A and B parallel to the axis of the valve block are arranged on the outer end face of the valve block; the sensor-provided rod ends of the two hydraulic cylinders are free ends; the ends of piston rods of the two hydraulic cylinders are each connected with a fixed ring; a lantern ring is arranged on each fixed ring; the two lantern rings of the two hydraulic cylinders are connected with the two ends of a flexible rope correspondingly; and the flexible rope is wound around a swing shaft perpendicular to the hydraulic cylinders, and the middle point of the rope is fixed to the swing shaft. The hydraulic swing driver has the beneficial effects of being high in response speed and high in power-volume ratio, work efficiency is improved, and meanwhile the beneficial effects of the high control precision and position resolution ratio are achieved. By means of integrated design of the hydraulic swing driver, the number of hydraulic elements is reduced, and the space utilization rate and portability of a whole device are greatly increased.