Based on three-dimensional laser scanning, taking a modern mine in Xinjiang as the research object, this paper studies the measurement technology of surrounding rock deformation of its mine development roadway. In the mapping of mine soft rock roadway, according to the actual situation of the survey area, the cloud data acquisition method based on the target point is selected. At the same time, the appropriate measuring points are selected, and the parameters such as scanning maximum measuring range, point cloud sampling density are set. Aiming at the single site 3D laser scanning point cloud, a tunnel modeling method based on cylindrical projection surface is proposed, which can quickly realize the automatic point cloud data modeling. The experiment shows that the method proposed in this paper has very high precision in the construction of three-dimensional model of mine roadway. The precision of the model is determined by the precision of the acquired point cloud. Through the analysis and evaluation of the calibration field, the precision of the point cloud data is ±4.8 mm and ±6.4 mm respectively when the scanning distance is 41 m and 81 m. Compared with Leica Cyclone 9 method, this method has the characteristics of automation and high efficiency. The method based on cylindrical projection surface provides a feasible method for the tunnel point cloud modeling, and provides the research basis for the subsequent tunnel point cloud modeling based on multi site.