Hybrid electric vehicle and engine start control method of vehicle

The invention provides a hybrid electric vehicle and a control method thereof, and is mainly used for start control of an engine. A first rotating speed and a second rotating speed are set and the engine is controlled to inject oil or not to inject oil according to the two rotating speeds, the start control method of the engine in a hybrid power system is optimized, misoperation of a driver is reduced, and the reliability of a BSG (Belt Starter and Generator)/ISG (Integrated Starter and Generator) motor to start the engine is improved.