According to the ore property of an antimony ore,sufficient explorative tests and systematic condition tests are conducted,realizing reasonable recovery of antimony and achieving satisfactory test index.When the grinding fineness of -0.074 mm accounts for 70 %,ore pulp pH is 6.49 and other reagent regimes are optimum,the closed circuit of twice roughing,twice scavenging,roughing concentrate regrinding(regrinding fineness of -0.045 mm accounts for 85 %)and three times cleaning flotation can obtain the antimony concentrate with productivity 3.63 %,antimony grade 51.13 % and antimony recovery rate 91.45 %.