The invention discloses a copper-sulphur separation and ore dressing method for high-sulphur copper ores. The copper-sulphur separation and ore dressing method comprises the following steps: crushing, grinding and grading high-sulphur copper raw ores, feeding a grading overflow to a low-intensity magnetic separation operation, pre-selecting low-intensity magnetic concentrates, that is, pyrrhotites, and discharging low-intensity magnetic tailings; feeding the low-intensity magnetic tailings to a copper flotation operation, obtaining copper concentrates with a Cu grade of greater than 18% and a copper recovery rate of greater than 85%, and discharging copper flotation tailings, wherein during the copper flotation operation, lime is used as a pH regulator and a pyrite inhibitor, butyl xanthate is used as a collector, and No. 2 oil is used as a foamer; and feeding the copper flotation tailings to a flotation sulphur dressing operation to obtain sulphur concentrates, and throwing final tailings. The copper-sulphur separation and ore dressing method disclosed by the invention has the advantages of being stable in ore dressing indexes, low in medicament consumption, clean and environment-friendly, simple and convenient to operate, easy to operate and manage in the field, and the like; and the pyrrhotites are pre-selected through the low-intensity magnetic separation, the interference of the pyrrhotites on the copper flotation is eliminated, thus copper flotation indexes are greatly improved, the phenomena of high fluctuations of a copper concentrate grade and a copper recovery rate are avoided, and energy-saving and consumption-reducing effects are remarkable.