Modeling has become the bottleneck of simulation for complex mechanical system. It is extremely needed to be improved for integrated manufacturing system (IMS) which is currently being implemented widely. Aiming at such problem, three levels of technologies such as data model, controlling model and automatic model are discussed in detail according to the concept of data-driven: 1) using public data zone (PDZ) uniform data structure and data-driven mechanism are put forward; 2) workshop, cell and machine are partitioned to form a three level hierarchical control framework, and their model controllers as well as control rules are explained respectively; 3) data saving and extracting interface, and auto-model generator on the basis of PDZ are developed, so that data-driven auto-model generation is realized. The model is finally realized in eM-Plant simulation platform through secondary development. Multi-type products of a military industry are used for case study. The result shows high efficiency, adaptability and applicable value of this model.