The focus of the work is to build a micro-displacement measurement of computer vision for micro-bending forming with high measuring accuracy.Matlab was utilized to write camera calibration program,and the internal and external parameters of the camera was calculated.The method made use of OpenCV to conduct gray level transformation,image binary,Canny edge extraction,and adopted sequential similarity detection algorithm to carry out template matching.Results indicate that the measurement method of micro-displacement is simple in operation with high efficiency.