This Document Proposes a System of Process Planning Template Design Based on XML. in this System, the Process Planning Documents Are Described by XML. the Author Analyzed the Process Card Template Model, and Devised a Template Design Function. Using this Function, Planners Are Able to Design and Modify Process Planning Cards According to their Requirements. the System Supplies a Uniform Interactive Platform for the Identical Type of Process Documents, and Lays a Strong Foundation for the Further Versatility and Practicability of a CAPP System.