Abstract: In order to improve the efficiency of the flotation machine currently used, its structure is optimized based on the optimized structure of the laboratory-scale flotation cell. On the impeller a flow stabilizing mechanism is fitted for increasing agitation speed and improvement of mineralization effect while stabilizing the flow regime of pulp, so as to improve flotation performance. Practice shows that while ensuring the ash of flotation concentrate remains unchanged, the optimization work has led to a rise of flotation tailings by 5.48 percentage points, an increase of yield of concentrate by 6.08 percentage points and a gain of annual economic revenue of 10.738 3 million yuan, yielding a favorable economic result for the plant.