The invention discloses a method for reducing titanium oxide-contained slag by iron-contained cokes and enabling TiC to enrich and grow. Iron powder with higher specific gravity than coking coals is mixed in the coking coals for firing according to a certain ratio to prepare iron cokes with approximate density with titanium-contained slag liquid for high-temperature carbonization process of titanium-contained slag, so that the coke floating problem in traditional carbonization process is solved, and the cokes can be uniformly mixed with the slag liquid; after the coking carbons in the iron cokes are carbonized and consumed by the titanium-contained slag, generated TiC grains are enriched to grow around remained iron particles; the Fe-TiC combination size is far larger than the mechanical beneficiation separation requirement to create conditions for further separation; and a certain quantity of CaF2 is added to greatly increase the Fe-TiC combination size. The TiC grains are obviously enriched to grow around the iron particles; the average particle size of Fe-TiC combinations can reach 120-240 microns; the average radial length of TiC can reach 10-20 microns; and industrial application can be achieved.