Big bag unpacking and feeding mixer

The invention discloses a big bag unpacking and feeding mixer, and relates to the technical field of mixer equipment. The big bag unpacking and feeding mixer comprises a mixer body, wherein the mixerbody is connected with a feeding station, and a conveying system is connected between the mixer body and the feeding station; the feeding station comprises a feeding plate, the bottom and the top of the feeding plate are respectively connected with a vibrating screen and an isolation cover, an open feeding port is formed in the isolation cover, and a feeding cavity formed by the isolation cover and the feeding plate is connected with a negative pressure dust collecting device; the conveying system comprises a gas-material mixer and a gas-material separator, and a conveying pipe is connected between the gas-material mixer and the gas-material separator; and the gas-material separator comprises a powder material discharge port and an air outlet, and the air outlet is connected with a dust remover. In the processes o