The mixed filling and packaging production line is centred around a screw conveyor, drum mixer, and powder filling machine. The first screw conveyor transports the material into the drum mixer, where it is uniformly mixed by rotating blades; after mixing, the material is conveyed by the second screw conveyor to the powder filling machine, which fills the material into packaging containers according to the set quantity, forming an automated process of 'conveying-mixing-reconveying-filling.' This system is suitable for bulk packaging of powder materials, improving mixing uniformity and filling accuracy while reducing labour costs.