The invention provides a circular disc feeder used for processing fluorite mineral aggregates. The circular disc feeder comprises a hopper and a circular disc, wherein a discharging hole is formed under the hopper; the circular disc is fixed under the hopper and a gap is formed between the circular disc and the discharging hole; the circular disc feeder further comprises a scraping plate; the scraping plate is fixed on the hopper; a material guide device is arranged at the central position of the circular disc, is arranged at the central position of the circular disc and stretches into the hopper from the discharging hole; the material guide device comprises a material guide hopper and a material guide cover; the material guide cover covers the outer part of the material guide hopper and is coaxial to the material guide hopper; the material guide hopper and the circular disc are fixed; and the material guide cover is fixedly connected with the scraping plate. Compared with the prior art, the circular disc feeder has the advantages that the material guide cover covers the material guide hopper and the material guide hopper is used for supporting the material guide cover; when the circular disc feeder is operated, mineral aggregates fall onto the circular disc along a material guide groove formed in the outer wall of the material guide cover; the scraping plate is used for scraping the mineral aggregates into a conveying mechanism with the help of a connection plate; under the matching of the connection plate, all the mineral aggregates at the periphery of the material guide cover are scraped off and are not remained; and meanwhile, the scraping between the scraping plate and the material guide cover is avoided and the noise pollution is lowered.