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This invention belongs to the field of mineral processing engineering technology, specifically disclosing a high-efficiency roughing method for copper-iron symbiotic ores. The roughing method involves feeding the raw ore into a primary mill for wet grinding, then performing spiral classification on the primary slurry to obtain overflow slurry I and underflow slurry I. Underflow slurry I is returned to the primary mill for regrinding. Overflow slurry I undergoes primary cyclone classification, and overflow slurry II is adjusted with water to obtain flotation slurry. Underflow slurry II is fed into parallel secondary mills I and II for wet grinding, and the wet-ground slurries are combined to obtain secondary slurry. Flotation of the flotation slurry yields rougher concentrate I and rougher tailings I. Rougher tailings I are discarded, and rougher concentrate I undergoes weak magnetic roughing to obtain rougher concentrate II and rougher tailings II. Rougher tailings II are sent to weak magnetic scavenging. Rougher concentrate II undergoes secondary cyclone classification, overflow slurry III is sent to weak magnetic cleaning, and underflow slurry III is returned to the secondary mill II for regrinding. This invention features high grinding efficiency and copper and iron recovery rate, low energy consumption, and a small variety and amount of reagents.