Single-chip microcontroller is the most commonly used processor in embedded systems.Many embedded systems require real-time and efficient task processing,which requires designing programming methods.Explored the efficient programming concept of single-chip microcontrollers without the need for an operating system,introduced its advantages and limitations,and listed some practical application examples.By analyzing these examples,demonstrate the feasibility and advantages of using the programming concept of single-chip microcontroller without an operating system in practical applications.In some specific scenarios,single-chip microcontrollers can effectively improve the efficiency and reliability of embedded systems without the programming concept of an operating system.