Abstract: Type holes wheel is a core component of mechanical seed metering device, traditional manufacture method for the irregular type holes can not meet the requirements of accuracy and cost. Three dimensional printing (3DP) technology is different from the traditional manufacture method. The physical entity can be directly printed out by 3-D printer from the CAD model. Type holes wheel was modeled by the three-dimensional software Pro/E, and the model file was imported into 3D printer after converted by the pre-processing software. With three-dimensional printing technology, the type holes wheel can meet accuracy requirement, reduce the trial time, which were restricted by the complexity parts before. Three dimensional printing (3DP) technology can be applied in the design and manufacture of complexity and important agricultural products.