The utility model relates to a retrieve device of low concentration, multicomponent, low pressure of smelting tail gas, the low -noise centrifugal blower fan comprises a blower fan, first vacuum pump, second vacuum pump and adsorption equipment, adsorption equipment includes one section adsorption equipment and two -stage process adsorption equipment, one section adsorption equipment is connected to the fan, one section adsorption equipment's exit end still is equipped with first journey control valve, one section adsorption equipment connects two -stage process adsorption equipment, one section adsorption equipment's entrance point is connected to two -stage process adsorption equipment's exit end, be equipped with second journey control valve on two -stage process adsorption equipment exit end to one section adsorption equipment entrance point, two -stage process adsorption equipment is connected to the main part device, be equipped with third journey control valve between two -stage process adsorption equipment and the second vacuum pump, the device simple structure, but purified gas retrieval system or discharge to reach standard after the processing, the hydro carbons component of recovery can be recycled as the industrial chemicals, reduces atmospheric pollution, reduce cost, resources are saved.