According to the design criterion of V belt wheel,by using the Pro / E parametric design,through the relationship,parameters and program development tools of Pro / E,the 3D model of the V belt wheels is designed. According to the different sizes and work requirements,input corresponding parameter values,the standard 3D model of V belt wheel can be easily designed and realized parametric design of V belt wheel. The 3D model of V belt wheel can export the CAD graphics,undertake assembly and import model to other software for motion simulation and dynamics analysis. Through the parametric design of V belt wheel,the design time is saved,the design process is simplified,the working efficiency is improved.