The utility model provides a reinforce coarse coal mud floatation device, including flotation concentrate collecting vat, upper cylinder body, upper cylinder body, chats circulation system, base cone.Upper cylinder body's upper portion links to each other with the flotation concentrate collecting vat, and upper cylinder body's lower part and water distributor pass through mutually, are equipped with the water distribution hole on the water distributor, and upper cylinder body's bottom links to each other with upper cylinder body's top. Upper cylinder body's upper portion and pan feeding return bend pass through mutually, and upper cylinder body's bottom is equipped with circulation ore pulp pan feeding pipe, cone tank and circulation ore pulp discharging pipe from top to bottom in properorder, circulation ore pulp pan feeding pipe and circulation ore pulp discharging pipe are linked to each other by circulation ore pulp pipe. Chats circulation system comprises circulation ore pulp pump, manometer and bubble generator to connect gradually through circulation ore pulp pipe. The wide -mouth and the upper cylinder body bottom of base cone link to each other, and the slot of base conelinks to each other with the tailing pipe. The coarse grain coal has been overcome because the difficult problem that flotation effect is poor that easy desorption led to the fact to the existence inflow field owing to rise in the upper cylinder body, has increased the productivity of flotation clean coal.