Abstract: Methanol fuel has a large potential for marine applications of solid oxide fuel cells due to its extensive source and convenient storage and transportation. A methanol-fueled solid oxide fuel cell (SOFC) cogeneration system for the marine is proposed. The reforming reactor model is established based on the kinetics of methanol reforming. A SOFC mechanism model is established by Aspen Custom Model software. The influences of water alcohol ratio and reaction temperature on methanol reforming, fuel utilization and operating temperature on SOFC working processes are analyzed. The results indicate that the optimal water to alcohol ratio and reactants outlet temperature are 1.3/1 and 280℃, respectively. The optimum operating temperature and fuel utilization of SOFC are 760℃ and 0.65, respectively. The energy loss and exergy loss of the system will increase with the increase of SOFC power. When the SOFC power is 50 kW, the electrical efficiency, energy efficiency and exergy efficiency of the system are 59%, 89% and 41%, respectively. The proposed cogeneration system could realize efficient cogeneration supply and provide guiding recommendations for SOFC ship platform applications.