Abstract: To simplify propane steam reforming process and reduce hydrogen production cost, a shell-and-tube heat exchanger reforming reactor model was constructed using COMSOL. The temperature and velocity of hot air at the reactor inlet were selected as operating parameters. Simulations were conducted to analyze their effects on propane steam reforming and to determine the optimal operating conditions. Results show that under rated conditions, a higher hot-air inlet temperature promotes more complete propane reforming. Propane is fully consumed when the inlet temperature reached 900 K. Increasing the hot-air inlet velocity also favors the forward steam reforming reaction. At inlet velocities of 1.25 m/s and 1.5 m/s, propane is completely converted, with hydrogen mass fractions reaching 0.099 in both cases. Considering both energy consumption and reaction efficiency, the optimal operating condition is 900 K and 1.25 m/s.