Three-degree-of-freedom posture adjusting device

The utility model discloses a three-degree-of-freedom posture adjusting device which comprises an upper-layer posture adjusting table, a lower-layer platform, a front driving device, a middle driving device, a rear driving device, two measuring units and four locking mechanisms. The front driving device comprises a front driving device servo electric cylinder, a front driving device mounting base, a front driving device piston rod, a joint, a sliding block mounting seat, a front driving device servo motor, a front driving device guide rail and a first guide rail mounting plate; the device is simple in structure and easy to operate, three-degree-of-freedom posture adjustment including front-back movement, transverse movement and rotation around the center of the platform can be carried out on the upper-layer posture adjustment table through the front driving device, the middle driving device, the rear driving device and the measuring unit, degree-of-freedom parameters of the upper-layer posture adjustment tabl