In order to realize convenient and efficient workflow aided design and parameter optimization, the object-oriented type and graphical editing interface for parameter configuration of graphic elements such as arrow lines and nodes are designed for the activity-on-arrow network diagram, which can automatically generate the relationship model of graphic elements while the user edits the network graph. Topology traversal is used to automatically determine the standardization of the network diagram, calculate the critical path and time parameters, and provide a convenient tool for users to optimize the workflow. The results show that the design can provide assistance for multi-domain workflow optimization.