Combined with the national building standard library and the analysis of steel-bar truss laminated slab, the information of precast components are categorized into general information, type information, geometry information, rebar (steel-bar truss) information, hoisting information, and pre-embedded wire box (reserved hole) information according to the design scheme of truss reinforced laminated concrete slab structure on basis of current technical regulations and standards. Based on the specification in local coordinate system of components and the regulation in ichnographic representation rules of laminate layer, combined with general description and construction details, the expression of truss reinforced laminated concrete slab in ichnographic representation has been achieved through using code-based precast components to replace detail drawings. This method is simple in diagramming, convenience in reading, and comprehensive in information, which can greatly improve the design and reading efficiencies for enhancing the information exchange.