In the production of stamping parts, material cost is a problem that must be considered, so it has important significance in Improving utilization of materials and production efficiency for reducing manufacturing cost. Traditional blanking process record a good location by using mould to compare with materials and then punch materials in accord to these datas. It has low efficiency in mass process. This article will connect punching with machine vision for the first time. Analyzing the blanking area in materials by image processing and stocking layout precisely. Thus ;the utilization of materials and production efficiency is more improved.