Abstract: The author proposes a new method and design of intelligent system preventing from pressing accelerator pedal mistakenly based on MSP430 when emergency braking is required. The system used the throttle position sensor，the ranging radar，the throttle pressure sensor and the throttle acceleration sensor to collect the driving information of the car，and integrated these intelligent control parameters for comparison with the threshold values and for intelligent analysis. Thus，the driver′s intention to step on the throttle is accurately determined. After the confirm of pressing accelerator pedal mistakenly，emergency braking and engine idle speed control are adopted，which finally achieve the purpose of safe driving.

Key words: MSP430, intelligent control, preventing from pressing accelerator pedal mistakenly, idle control, safe driving