Abstract: in orderto deeply understand the iron ore aected to the coal pyrolysis and to seek economic and effective pyrolytc catalyst.in the reactor of the secondsection of temperature control fixed bed, Baima vanadiu tianiumiron ore as the catalyst afeced to the coal pyolfic gas.the yie d rate of th lituid products and compostion variation was studied. The possible catalysis funcional mechanism was discussed. The festresuts howed that under theftemperature of 50』 ～ 8o0 ℃ afer the ion ore aded,the gas yield rate would be increased,the Ha.COp and CHa yeld raes woula be inreased and Co and otea hyarocanon gas yedwauld be deceasedAthough the tar yield was decreased,the H / atompercentage of the tar was increased and the benzene, aphtalene and other ight compostion conents were inceased.The vanadiun titanium iron ore could remarkably increase the liht compositin conient in the tar could make the ar liht and could improve the cualit ofaol roducts of coal pyrolysis.