Abstract: The present disclosure provides a method and an apparatus for modeling a digital model of a production system, wherein the method comprises: dividing a process flow of the production system according to the process to obtain a plurality of process units to be constructed and link units; determining the process relationship between the process units, and constructing a digital model architecture, a flow model and an environment model; and constructing a digital model corresponding to the system flow according to the digital model architecture, the flow model and the external environment. With the solution of the present disclosure, it is able to realize the modeling of the process flow for complex production systems and improve the process control efficiency of the production system.