Abstract: In order to effectively recover the low grade fine grain collophane produced by the heavy medium separation of Yichang phosphate rock, and improve the utilization of resources, the multi-element analysis and and particle size analysis had been carried out. The analysis show that the fine particle under 0.045mm fraction content is above 94%, the grade of P2O5 is nearly 15.62%, MgO content of 4.30%, SiO2 content of 24.46%, which belongs to the micro fine silicon low grade cellophane. Thus to improve the ore grade, low pulp concentration direct-reverse flotation should be implemented. The test results show that the final dressing index with P2O5 grade of 29.09%, recovery of 78.01%, MgO content of 0.82% has gained by flow of one coarse one sweep two fine direct flotation joint one coarse one sweep reverse flotation under pulp concentration of 24%. It can effectively recover the low grade fine grain collophane produced by the heavy medium separation of Yichang phosphate rock and improve the utilization of resources.