The invention discloses a method for recovering iron and enriching copper-tin from blaster furnace slag (commonly known as bottom iron) of electric furnace zinc smelting, and belongs to the field of metallurgy and chemical separation. The method comprises the steps that the bottom iron is subjected to cutting and crushing treatment firstly, after an alloy is totally melted under the high temperature, melted alloy liquid is subjected to selective oxidation under the oxidizing atmosphere, coarse copper containing tin and ferrous oxide slag are obtained, and volatilization separation of indium and a part of arsenic is realized; hydrochloric acid leaching of the ferrous oxide slag is conducted, then filtering is conducted, and filtrate and filter residue are obtained; cooper removal is conducted on the filtrate, deep removal of impurities is conducted on copper removing liquid, and then a pure FeCl2 solution is obtained; and finally, spray pyrolysis is conducted, so that iron oxide red andhydrochloric acid are obtained, and the regeneration rate of the hydrochloric acid is 95-99%. The method for recovering the iron and enriching the copper-tin from the blaster furnace slag of electricfurnace zinc smelting provides a new way for high value utilization of the blaster furnace slag of electric furnace zinc smelting and is green, environmentally friendly, remarkable in energy saving effect and good in industrial application prospect.