A belt adjustment and fixation hook (1), comprising a body (10), a hook portion (11), a limiting convex portion (12) and a belt installation frame portion (13); the body (10) has a first main surface (101) and a second main surface (102) opposite thereto; the body (10) is provided with a first through hole (103); the limiting convex portion (12) is located in the first through hole (103) and extrudes beyond the first main surface (101) to limit a support rod (2); and the belt installation frame portion (13) is connected to the body (10) to further connect to a belt (3). The belt adjustment and fixation hook (1) fits the support rods (2) having different diameters; in addition, the belt adjustment and fixation hook (1) is convenient to detach and replace the belt (3), thus improving user experiences and reducing costs.