The invention provides a fast method for expressway pavement segmentation and camera location, and relates to an intelligent event analysis system of video surveillance data based on target detectionof video images and applied in expressway traffic scenes. The method comprises the steps of 1) sample collection and model training; 2) network model design; 3) model loss function; 4) model training;5) model prediction. Compared with the prior art, the method can solve the problem of location and segmentation of the expressway pavement under multi-scenes, different weather conditions and different road conditions and the problem of location of the position of the camera relative to the pavement under the multi-scenes, the different weather conditions and the different road conditions.