The present invention discloses a blast furnace coal gas recovery and utilization system, which comprises a dry type bag type dust removing device, an organic Rankine cycle power generation device, a multi-stage compressor device and a fuel gas steam combined cycle power generation device, wherein the organic Rankine cycle power generation device comprises an evaporator, an expansion turbine and an electric generator, the working substance inlet of the evaporator is communicated to the working substance outlet of the expansion turbine through a pipeline, the working substance outlet of the evaporator is communicated to the working substance inlet of the expansion turbine through a pipeline, the electric generator is connected to the output end of the expansion turbine, and the dry type bag type dust removing device, the evaporator, the multi-stage compressor device and the fuel gas steam combined cycle power generation device are sequentially connected through pipelines. According to the present invention, with the blast furnace coal gas recovery and utilization system, the temperature and the pressure of the blast furnace coal gas are completely utilized, and the recovery and utilization rate of the blast furnace coal gas is improved.