Parking Heater with High Energy Utilization Rate

A parking heater with a high energy utilization rate comprises a shell and a combustion device. The combustion device is installed in the shell and has a gap, which is set as an airflow channel, and the shell is provided with at least one air inlet communicated with the airflow channel; the combustion device comprises a cylinder body and an exhaust gas pipeline, and the cylinder body is provided with a combustion chamber and a fuel pipeline; wherein, the fuel pipeline is used for communicating with the combustion chamber and providing fuel.