Abstract: The 3D modeling of coal mine laneway is the core issue of constructing coal virtual environment,but the work of the existing laneway modeling method is large,and it's unable to realize fast modeling.This paper investigates digital image-based three-dimensional reconstruction method,and applies to the fast three-dimensional modeling of laneway,obtains matching points of laneway images by corner detection and matching,and calculates the coordinates of space points,ultimately implements surface restoration by the Delaunay triangulation technology,and gives the experimental results of a laneway three-dimensional reconstruction system using OpenCV.