Turbocharging is playing an increasingly vital role in the development of gasoline engines. The EcoBoost petrol engine equipped with a turbocharger has brought the efficiency to help increase the engine’s capacity while the engine volume does not change. When the car operates in a small-engine city, it will save fuel and reduce emissions. When the vehicle operates on the highway, the turbocharged system works to help the engine operate like a large-cylinder engine. Therefore, studying the turbocharged system for gasoline engines is very important. For design calculations of the turbocharger, if you know the movement of the airflow, it will help optimize the structure and reduce the losses while ensuring the operating conditions of the turbocharger. In this study, authorities use the computational fluid dynamics (CFD) Fluent module in Ansys software to study the movement of the gas flow through the turbine mounted on a 1.4-L petrol engine. The research results show the turbine’s exhaust, temperature, and pressure field velocity.