As the existing 3D scanning equipments have large size,slow measurement and impressionable for ambient light,a small morphology measurement device is developed by using binocular stereo vision and speckle structure light. The projection module and hardware structure are designed,and then image point coordinate match is studied by digital image correlation method. Finally,measuring effect and accuracy of the system are verified. The results show that for a single point cloud,the measuring process of scanning device is fast,and data acquisition can be done in 2 ms. The accuracy reached 0.1 mm when the number of generated points are large. Therefore,the small speckle projection device can achieve fast scanning of work piece and have a higher precision.