Method, system and equipment for quickly constructing three-dimensional model of highway scene and medium

The invention provides an expressway scene three-dimensional model rapid construction method, system and device and a medium. The method comprises the steps that a terrain image fusion technology, an image intelligent recognition technology and a random point generation technology are adopted to form a three-dimensional model of the environment along the highway; a high-precision pavement element three-dimensional model of the expressway is formed by adopting an elevation abnormal data rejection technology, an automatic marking line recognition technology and an automatic lane center line generation technology; identifying position, size, height and shape information of road facilities, identifying position, size, height and shape information of electromechanical equipment, and forming a road facility three-dimensional model and an electromechanical equipment three-dimensional model of the highway; and forming a three-dimensional model component library, and combining one or more of the four models to generat