Concerning the many factors,such as hi gh speed,large field of view and high accuracy,which are required in dynamic pos ture measurement for high-speed train,the binocular vision measurement system i s built with two high speed cameras,and the real-time measurement for high-spe ed train is realized by synchronously capturing features produced by high power pulsed laser.A camera calibration method based on non-linear imaging model has been proposed to reconstruct the optical imaging process and build the relations hip between the imaging beams and image points in 3D space.By so doing,the mathe matical model between the angle of incident beam and coordinates of image points has been built and therefore the high-precision camera calibration with large field of view has been gained.Considering a reference meter with a known length, the calibration for the position relationship between the two cameras is accompl ished quickly and precisely with the bundle adjustment algorithm.It is concluded that the precision of camera calibration and that of double-camera calibration can reach ±5＂ and ±0.2mm,respectively,and this system with the measurement precision of ±0.5mm proved by experiment results will serve as a new efficient way for the dynamic posture measurement for high-speed train.