Circulating type material distribution system of ring hopper charging machine

The utility model discloses a material distribution system of a circulating type ring hopper charging machine, which comprises the ring hopper charging machine with an inner ring frame and an outer ring frame which are concentric, a plurality of material storage tanks which are distributed annularly, a hopper cover resetting device, a pneumatic charging device, a PLC (Programmable Logic Controller) control system and an intermittent material supplementing device. In the circumferential operation process of the ring hopper, the pneumatic feeding device and the hopper cover resetting device are matched with each other, so that the hopper cover is opened and closed, and the material distribution operation is performed or stopped; the PLC control system is used for processing and judging transmission signals of the upper limit material level monitoring device and the lower limit material level monitoring device, when an air cylinder of at least one pneumatic feeding device is started, the intermittent material su