Abstract: With the continuous development of computer technology,automobile design and manufacturing industry pays more and more attentions to the requirements of generalization and standardization. The fine standardization demand brings about the continuous subdivision and unification of auto parts. Based on XML and OpenGL,this paper designs and implements the model library for auto parts. The establishment of the model library can integrate the rich experience of finite element modeling and precious geometric modeling data of predecessors,and carry out unified management and private storage of numerous model libraries of auto parts,which can improve the efficiency of modeling and analysis to a certain extent.