The invention provides an internal-external clamping type jacket leveling device, comprising an upper clamping mechanism, a middle lifting mechanism, a lower clamping mechanism and a scale mechanism; the middle lifting mechanism is arranged between the upper and lower clamping mechanisms; the upper clamping mechanism comprises a clamping body, a plurality of lifting lugs used for lifting and a plurality of clamping jaws and clamping pressure cylinders used for clamping the pile body are arranged on the clamping body, and the clamping jaws are connected with piston rods of the clamping pressure cylinders; the middle lifting mechanism comprises a pressure cylinder and engaging lugs arranged at the two ends of the pressure cylinder, wherein, one end of one engaging lug is connected with the pressure cylinder and the other end of the engaging lug is connected with the upper clamping mechanism, and one end of the other engaging lug is connected with the pressure cylinder and the other end of the engaging lug is connected with the lower clamping mechanism; the lower clamping mechanism comprises a clamping body which is provided with a plurality of jaw bodies and clamping pressure cylinders, and the jaw bodies are connected with the piston rods of the clamping pressure cylinders; the two ends of the scale mechanism are respectively fixedly connected with the upper and lower clamping mechanisms; the leveling and clamping operations are finished at the same time, therefore, the work efficiency is improved and the cost is lowered.