For the modeling of spatial dimension in current chinese dispatch center is always incomplete, and the maintenance of model is always repeated again and again, a distributed modeling method based on IEC 61970 is proposed in this paper. It splits and merges the model by utilizing boundary comparison table and has no requirement for uniform naming, so it will not interrupt the online EMS system. The proposed method has designed an automatic flow control module, and users can take part in the process of modeling because fault-tolerant mechanism and safe returnable mechanism have been taken into account. Release-subscribe style is adopted by this method, so it can provide incorporate model management and release service to the control center. With this technology, the distributed modeling system can provide basic data and technical support to the online monitoring and security analysis function, and the problem of spatial dimension uniform modeling can be solved effectively.