At present, the evaluation of soft science research projects in China started late, and there is still a gap in the theoretical research of soft science evaluation compared with the United States, Germany and other developed countries. It’s still to be made improvement about evaluation content, evaluation classification, evaluation methods and evaluation index and so on. This paper mainly focused on science and technology projects of the national research institutions, especially ana-lyzing the domestic and foreign development present situation of soft science project evaluation, the key link of the early stage of the project evaluation and evaluation methods. It mainly improves the pre-project evaluation model, including preliminary screening of projects, feasibility study, ap-proval,... classification, the combination of qualitative and quantitative comprehensive evaluation method, etc. The study provides some references in the present stage of soft science project evalu-ation system for our country.