The invention provides an automatic spraying positioning bracket, which comprises a lifting gear, a first limiting switch, a first guide rod, a first motor, a second limiting switch, a second guide rod, a spraying nozzle, a spraying nozzle fixing cart, a horizontal spraying track control framework, a transverse reciprocating traveling spraying positioning framework, a screw rod, a second motor, a gearbox, a falling ash recovering disc and a direction-adjustable traveling wheel. The automatic spraying positioning bracket has the beneficial effects that the work period is short, the efficiency is improved by 2 to 3 times, the labor is reduced, the cost is reduced, and one layer of neat cement mortar is saved; in the civil engineering of one building with an area of 10,000m<2>, the neat cement per 1m<2> needs approximate 3kg of cement, so approximate 30t of cement is saved; the adhering force of the spraying mortar is high, the density is high, the adhering is firm, the cement surface is firm, empty drums are avoided, the flatness of the wall surface is improved, and the plastering quality is ensured; and the pollution of air environment of a construction site is reduced, and the splashing amount of wastes of the plastering engineering can be controlled to be less than 2%.