Pouring stirrer for processing autoclaved aerated concrete slab and use method of pouring stirrer

The pouring stirring machine for autoclaved aerated concrete slab processing comprises a box body, a fixing cover and a third motor, a first motor is fixedly installed at the middle end of the left side of the fixing cover, and the output end of the first motor is fixedly connected with a screening mechanism; the screening mechanism comprises a screening drum, a supporting rod, a mixing rod and a rotating shaft, a vertical plate is fixedly connected to the right end of an inner cavity of the box body, and a partition plate is fixedly connected between the lower end of the inner cavity of the box body and the lower end of the left side of the vertical plate. Through the effects of a pump machine, a vertical plate, a third motor, a material mixing mechanism, a main material mixing rod, an auxiliary material mixing rod, a second gear, a third gear, a liquid homogenizing mechanism, a liquid passing plate, a spray head and an arc-shaped guide plate, the problems that an existing pouring stirring machine does not c