The utility model provides an adjusting mechanism and a displayer wall hanging support, and belongs to the technical field of displayer hanging supports. The adjusting mechanism comprises a back fixing part and an angle adjusting part. The back fixing part comprises a back frame and a hanging frame; the angle adjusting part comprises a base, a support, a shaft rod, a connecting seat, a worm gear and a worm, the shaft rod rotationally penetrates through the hanging frame, the shaft rod penetrates through the back frame and then is fixedly arranged on the back frame, the support and the connecting seat are both fixed to the front side of the base, one end of the shaft rod is rotationally arranged on the support, the worm gear fixedly sleeves the shaft rod, and the worm is rotationally arranged between the base and the connecting seat. When the angle of the wall-mounted displayer needs to be adjusted, the rotary knob is rotated, the rotary knob drives the worm to rotate, the rotating worm drives the worm gear to rotate, namely the shaft rod and the back frame are driven to rotate, the angle of the displayer in front of the back frame can be adjusted, and the angle of the displayer can be rapidly and easily adjusted even after the displayer and the wall are installed.