Abstract: Based on the analysis and summarizing of various support and hanger standards and styles，the hierarchy topological model of support and hanger is presented and the topological constraint model of support and hanger based on duality smart point model is put forward.The topological constraint model can resolve the nested smart group，which is brought on the multi-constraint and hierarchy structure of support and hanger.To resolve two key problems，that are variety of design standards and tight cooperativeness with other system，the modeling method based on the topological constraint template is presented to elaborate on the design standards of support and hanger.Therefore，the design of support and hanger is transformed into the solution of multi-constraint by the modeling method based on the topological constraint template.