The comprehensive inspection system of train wheelset state is an intelligent safety inspection equipment of train wheelset. The system comprehensively uses machine vision theory, laser technology and image technology to put forward the scheme of vehicle wheelset geometric parameter inspection and tread defect identification, so as to realize the non-contact, non-stop and on-line dynamic inspection of wheelset geometric parameters, It is of great significance to provide comprehensive and accurate wheelset operation data for effectively extending wheel life, reducing wheel maintenance expenses and ensuring railway operation safety.