The invention relates to an ore dressing technology for treating vanadium titano-magnetite. The technology comprises the following steps of: feeding crushed raw ore into a ball mill in a primary milling and grading closed path, and feeding primary graded overflow containing 40 to 50 percent of milled powder with the granularity of 200 meshes into a rough magnetic separator, wherein tailings in the rough magnetic separator are final tailings; demagnetizing the concentrate in the rough magnetic separator, then feeding for secondary grading, feeding secondary graded return sand into a secondary ball mill, returning the discharged ore in the secondary ball mill for grading, and feeding secondary graded overflow containing 65 to 95 percent of milled powder with the granularity of 200 meshes into a magnetic separator, wherein the tailings in the magnetic separator are final tailings; and demagnetizing the concentrate in the magnetic separator, then feeding into a high-frequency vibrating mesh fine screen, returning the ore on the high-frequency vibrating mesh fine screen to the ball mill, feeding the powder below the fine screen into a magnetic separation column, and returning middling in the magnetic separation column for secondary grading, wherein the concentrate in the magnetic separation column is used as final concentrate. The technology has the advantages of effectively improving the grade and the recovery rate of the vanadium titano-magnetite, reducing the ore dressing energy consumption, improving the utilization rate of resources and reducing the production cost.