Abstract: 【Purpose/significance】By analyzing the impact of discipline level on users' knowledge exchange behavior and effect, this paper helps to promote users' use of academic virtual community, improve users' knowledge exchange effect, and provide suggestions for the construction and development of academic virtual community.【Method/process】Taking "Computer Science and Technology" as an example, this paper collects user data and discipline data on ResearchGate platform, uses descriptive statistics to analyze the char⁃ acteristics of knowledge exchange at different discipline levels, then uses factor analysis and HLM to explore the impact of discipline level on users’knowledge exchange effect.【Result/conclusion】The results show that the performance of organizational and individual knowledge exchange is different at different discipline levels. In addition, discipline level has direct and moderating effect on users’ knowledge exchange effect significantly.【Innovation/limitation】The results may be affected by discipline characteristics, platform ac⁃ tivity and sample equalization issue.