A copper ore from abroad is characterized by a high copper content and a Iow oxidation rate, indicating that it is a primary sulfide copper ore. The copper grade reaches 1.21 %, while the contents of other metals such as lead, cobalt, and zinc are relatively Iow, lacking economic value for comprehensive recovery. To maximize the economic benefit of this ore, a flotation reagent optimization test was carried out. Test results show that under the conditions of grinding fineness with -0.074 mm accounting for 75 %, lime dosage of 500 g/t, and Z-200 dosage of 30 g/t, using a process flow of one roughing, two cleanings, and two scavengings with staged return of selected middlings, the closed-cireuit test yielded a copper concentrate with a grade of 31.09 % and a recovery rate of 97.62 %, while the copper grade in the tailings was only 0.03 %. The test results provide data support for the beneficiation process improvement and reagent optimization of similar types of ore, laying a solid foundation for enterprises to improve quality and reduce consumption.