The invention discloses a high-speed traffic all-lane-line automatic detection method adaptive to scene switching and relates to video monitoring data intelligent analysis systems based on target recognition in video images and applied to a highway traffic scene. According to the method, high-speed monitoring equipment video information is collected, analyzed and controlled. The method comprises the steps of (1) scene preprocessing of video data; (2) motion track direction analysis of all vehicles, namely vanishing point estimation; (3) perspective projection processing; (4) lane model establishment; (5) vehicle tracking processing; and (6) detection convergence iteration processing. Compared with the prior art, through the method, detection, analysis and positioning of all lanes on a highway can be completed under the condition of not depending on camera internal and external parameters and under all weather conditions and all road traffic conditions.