A calibration method for line structured light sensor with large scale is proposed for the requirement of large-size three-dimensional (3D) objects measurement.The initial values of camera intrinsic parameters are calibrated by planar target and optimized by Levenberg-Marquardt (LM) method based on the distance constrain between two adjacent control points. When calibrating structured light parameters using Quasi-one-dimensional target,a calculation method is proposed for solving the 3D coordinates of control points, which is based on the property of vanishing point and the geometric restrain between control points and coded points. The experimental results show that the proposed approach for calibrating the sensor and solving the 3D coordinates of control points can achieve good accuracy and stability,moreover, compared with the planar target, quasi-one-dimensional target has lower processing costs, can be used for calibration with more flexibility, and is more suitable for large scale field calibration.