Autonomous adjusting arm support

The utility model discloses a self-adjusting arm support which comprises a fixing box, an adjusting mechanism is arranged in the fixing box, the adjusting mechanism is provided with a supporting plate used for supporting the arm of a doctor through a supporting frame, and the adjusting mechanism adjusts the position of the supporting plate by driving the supporting frame to rotate forwards or reversely. According to the utility model, the characteristic that the hands and the feet of a surgeon in a fundus operation are divided is fully utilized, the surgeon can flexibly adjust the rotation angle of the arm support by continuously kicking the two buckle plates so as to meet the requirement of the surgeon on the rotation angle of the arm support in the operation process, and the adjustment process can be carried out autonomously; the arm support can be directly adjusted in place without a repeated communication process, in addition, large-angle adjustment can be achieved through improvement of a driving structu