Abstract: A new method for measuring targets 3D pose angle from mono-view in shooting ranges was presented in order to improve the measurement capability of 3D pose by live recording systems，which could get targets 3D pose precisely and quickly by utilizing the proportions of feature pointscoordinates. The model of imaging system and the definition of coordinates were introduced. The collinear equation was transformed including the scale of feature points on target, and the 3D pose angle of target was obtained by solving the nonlinear equations. The feasibility and errors of the algorithm were analyzed. Experiment results indicate that the algorithm is accurate and robust.