Abstract: Solid oxide fuel cell（SOFC） technology is a clean and efficient power generation technology, and its high temperature characteristics make it easy to realize cogeneration, which has a good development prospect. In order to investigate the influence of different fuel gas parameters on the discharge characteristics of SOFC, a 500W SOFC experimental rig was built, and hydrogen discharge experiments, methane dry reforming discharge experiments, and durability experiments were conducted to analyze the influence of fuel gas flow rate and CH₄/CO₂ inlet ratio on the open-circuit voltage and electric power. The results show that with the increase of fuel flow, the open-circuit voltage of the battery, the power will increase, and the increase tends to stabilize at 2 L/min.When Q_CO2/Q_CH4=1∶1 and CH₄ flow rate is 2 L/min, the methane dry reforming discharge performance is the best. When Q_CO2/Q_CH4=1.5, the SOFC discharge performance is less affected by the flow rate, and under this inlet ratio, it is more conducive to achieve low fuel flow rate and high current density discharge to maximize the SOFC discharge power.