The utility model discloses a double-driven blast furnace blower unit. The unit comprises a steam turbine, a blast furnace blower, a variable speed clutch and a coal gas turbine which are sequentially and coaxially connected. By the scheme of coaxial arrangement, the unit has a compact structure, is small in floor area and low in mechanical loss, equipment cost and investment (the investment is 30 percent lower than that of a mode of matching two single machines), and is convenient to arrange, and the payback period is shortened by 1 to 2 years. Moreover, the function and safety margin are not reduced, and the unit can be used for high-power blast furnace blower units and is an ideal unit used by metallurgical blast furnace systems.