Structural design competition has become one of the most influential professional science and technology events for civil engineering students.Civil engineering students' application ability of professional knowledge could be assessed by this competition, thereby the feedback function of the competition are performed. According to the corresponding points of the structural design competition and professional courses, the professional course feedback index system was built.The questionnaire survey was designed based on the feedback index system. Based on the analysis of survey data of two years' school competition and the entity models submitted by students, the effect of students' application ability of professional knowledge was assessed, and then the results were reflected to the related course group. The research provided a quantitative basis for curriculum reform, meanwhile provided innovative ideas for the healthy development of students' subject competitions.