The invention discloses a positioning rotary bracket component, which comprises a fixed bracket and a rotary shaft, wherein the fixed bracket is a gear with 36 teeth; six positioning grooves are formed on the surface of the gear, and a positioning switch is arranged on the surface of the gear; a shaft hole is formed in the center of the gear; the diameter of the shaft hole is 10.5 cm; a shaft crossing angle of the shaft hole is 90 DEG; a groove hole is formed at the front end of the rotary shaft and horseshoe-shaped; and the opening degree of the groove hole is 95 DEG. The positioning rotary bracket component provided by the invention is long in service life and high in load bearing capacity, company cost is reduced, and manufacturing cost is reduced.