The invention discloses a fine-flake graphite direct-reverse flotation purification technology. The fine-flake graphite direct-reverse flotation purification technology comprises a one-time rough grinding and roughing process, a five-time regrinding and six-time concentration process and a middling ore processing process. In combination of the direct-reverse flotation technology, a reverse flotation procedure begins to be adopted from the fourth concentration, the content of fixed carbon of the obtained final concentrate is 90-92%, and the concentrate recovery rate is 85-86%. The graphite direct-reverse flotation procedure replaces a traditional direct-reverse flotation procedure, the reverse flotation technology is adopted in the later stage of the concentration procedure, mingling of gangue minerals caused by super fine ore grinding fineness can be effectively reduced, particularly mingling of the silicate gangue minerals such as mica and quartz in the concentrate can be effectivelyreduced, the content of the fixed carbon of the concrete is increased, the mineral separation technology of the fine-flake graphite is optimized, the production cost of the subsequent chemical purification technology is lowered, and a brand new thought is provided for the fine-flake graphite purification technology.