Abstract: Hydrogen-fueled internal combustion engine (H₂ICE) is an effective way to use hydrogen as a future energy carrier. Since the power density of the natural aspirated port fuel injection H₂ICE is lower than that of traditional internal combustion engine, turbo charging system technology is significant to increase the power output of H₂ICE. Based on a CNG engine with displacement of 9.73 L, the turbo charging H₂ICE model was built to deal with the turbo charging match problems. On this basis, H₂ICE turbo charging matching and optimization of compression ratio and intake valve opening timing were accomplished. The results of performance prediction show that the maximum torque of turbocharged H₂ICE is 890 N·m, which is two times of the natural aspirated H₂ICE. The efficiency is improved by 7%~15% and the specific emission of NO_x tends to decrease.