For the problem that the excessive fuel reservoir bring on the huge requirement of air injection when it is burning, and the economic evaluation result of fire flooding is not ideal, an indoor physical simulation experiment of in-situ combustion was conducted by adding two metal catalytic, ferric nitrate and zinc nitrate. The experiment results showed that, the gas composition fluctuation of the ferric nitrate catalytic experiment during the process of heavy oil fire flooding was greatly reduced compared to that of the blank experiment and zinc nitrate catalytic experiment, ,and the oil-producing time of ferric nitrate catalytic experiment was earlier than that of the blank experiment and zinc nitrate catalytic experiment; the ferric nitrate catalyst could increase the oxygen utilization ratio from 90.5% to 96.7%;?the content of the heavy oil burnt increased form 43.92 kg/m³ to 52.73 kg/m³, increasing by 20%; the air-fuel ratio decreased by 19.5%; at the same time,? the propulsion speed of fire flooding combustion front accelerated, and hydro/carbon ratio, heat of combustion, and deposition quantity of fuel also changed significantly.