A multi-view 3D datum mosaic method is presented by measuring optical coded points in an overlapped area in two partial measurement units with a stereo vision sensor.The method obtains the stereo vision sensor's location and attitude transform matrixes R and T by minimizing the linear least square criterion,and achieves the mosaic of measurement results through transforming the latter measurement results into the coordinate system of the former measurement process.When 12 coded points is adopted,the average errors in 1.2 m×1 m×0.4 m range at X,Y and Z directions are 0.08 mm,-0.07 mm and-0.02 mm respectively.The experimental results show that is a higher mosaic precision.Moreover,this method doesn't need to stick any target points on the object,which makes no-contact measurement come true.