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In this paper, the path planning algorithm and motion control technology of intelligent vehicles are studied. The artificial potential field method is selected for research. The distance parameter between the vehicle and the target point is introduced to solve the problem of target unreachability in the traditional potential field method. The boundary repulsion potential field is established to limit the range of vehicle motion. The repulsion potential field function of obstacles is optimized to solve the problem of target unreachability in the traditional potential field method. Considering the dynamic characteristics of the vehicle during driving, the vehicle dynamics model is taken as the control object, and the vehicle monorail model is combined with the tire cornering model. In an environment where obstacle information is unknown, to ensure the safety of vehicle driving, the decision-making layer needs to plan a safe collision free path.