Through the risk identification of highway project’s progress of construction, the authors divide the major factors into strong index and soft index, and then establish a risk index system Using the fuzzy logic combined with probability analysis, the authors calculate and evaluate the identified risk They make the evaluation on probability analysis and fuzzy logic method simple by using the principal component analysis, and automatically empowering and reducing dimensionality of the data for risk index system Finally, it will confirm the feasibility of the method and practical significance through the test on actual cases