Mechanical arm with high degree of freedom

The utility model discloses a mechanical arm with high degree of freedom, which comprises a main arm, the top end of the main arm is movably connected with an auxiliary arm, one end of the auxiliary arm is movably connected with a mounting rack, one side of the auxiliary arm is fixedly connected with a second motor, and one end of an output shaft of the second motor penetrates through the auxiliary arm and is fixed with the mounting rack. A first air cylinder is fixedly connected to the upper surface of the mounting frame, a first rack is fixedly connected to one end of a pneumatic rod of the first air cylinder, mounting holes are formed in the two ends of the mounting frame, a cross is movably connected into the mounting holes, a first gear is fixedly connected to one end of the cross, and the first gear is meshed with the first rack. The two ends of the cross are movably connected with rotating frames. According to the mechanical arm, one motor is installed on each section of rotating arm, the rotating effi