Arm-chair capable of fully covering back and adjusting and supporting in multiple dimensions

The invention discloses an arm-chair capable of fully covering the back and adjusting and supporting in multiple dimensions in the technical field of seats. The arm-chair comprises a chair back, a cushion, a supporting and adjusting part and a controller, the seat cushion is a soft cushion, a bottom frame is arranged at the bottom of the seat cushion, the chair back is vertically and fixedly connected to the rear side of the seat cushion, an air bag is arranged in the seat cushion, a plurality of supporting and adjusting pieces are arranged in the chair back, and the supporting and adjusting pieces can forwards protrude and retract into the chair back in a supported mode. Therefore, personalized adaptive supporting force can be provided for individuals with different weights when the individuals sit. In addition, the device can adapt to the physiological curvature of the spine of the individual by adjusting the radian of different sections of the chair back, can adjust the supporting force of a plurality of d