Pouring system of large mining machinery main frame casting

The invention discloses a pouring system for a main frame casting of large mining machinery, which belongs to the technical field of mining machinery and comprises a box body, a material injection bin, a stirring mechanism, a material blocking mechanism, a limiting frame, a pouring mechanism, a driver and moving wheels, the use height of the supporting plate can be changed under the action of the air cylinder, so that the use height of the pouring nozzle can be changed, the pouring purpose of different heights can be achieved, practicability is high, and the application range is wide; the purpose of quantitative discharge can be achieved by changing the distance between the first baffle and the second baffle; after the motor is started, the rotating shaft can be driven to do circular motion around the circle center of the motor, when the rotating shaft rotates, the sleeve and the stirring plates on the circumferential surface of the sleeve can be driven to do circular motion, and therefore the using effect of