As an important process in knowledge management in the knowledge economy era,knowledge innovation is an effective method to improve organizational competitive capability.Based on analysis of existing researches,this paper establishes a research model,defines knowledge innovation capability and its four elements for construction project,and makes corresponding hypothesis.Survey questionnaire is carried out to get data.Then reliability and validity analysis are used to test the measures of each element and make corresponding revision.Structural equation modeling is employed to test the research model and identify the influence of each element on knowledge innovation capability.