Aiming at the poor flexibility of traditional flexible three-dimensional（3D） morphology measuring system and the need to paste cooperative target points in advance. A multi-feature shape complex surface 3D shape measurement based on optical coordinate 3D measurement system is proposed. The overall design scheme of the proposed measurement system is introduced and mathematical model is established for it. And the research on flexible measurement technology of complex parts 3D morphology is realized. The measurement accuracy and repeatability measurement accuracy of the detection system are experimental verified. The experimental results show that the flexible measuring system has high reliability and precision. At the same time， the outer dimensions of parts with curvature and special-shaped holes are measured for the shape of the non-sticking cooperation target. And the experimental results show the feasibility of the measuring system.