Abstract: In this paper, the MEMS acceleration sensor and the gyro sensor are used to analyze and determine the driving posture of the truck in the mining area. Through the analysis of the attitude of the truck in real time, it is determined that the horizontal road, up and down ramp, turning road is still in the loading or unloading state. Mastering the state and the environment of trucks can more accurately calculate truck braking distance; the millimeter wave radar anti-collision system provides the basis for mine truck safety distance calculation and achieves different road conditions with different braking strategies, which provides advanced technical means and methods for the safe production of open pit mine.