The simulation systems of carbon-carbon composite materials are independent. The process,microstructure and properties of C/C composites have no relationship. To solve the problem,the comprehensive simulation of CVI( Chemical vapor infiltration),microstructure-analysis and properties-forecast of C/C composite materials was investigated based the experimental database. Many disciplines such as C/C composite materials、database、software programming and computer simulation were used. The simulation system that utilized experimental database of C/C composite materials as data engine was established by VC + + platform,and the framework about propertiesforecast was built. The paper united TCVI,microstructure-analysis and properties-forecast as one system. The system achieves TCVI process simulation and microstructure-analysis. It has important guiding significance for researching integrated simulation of C/C composite materials.