According to the goal and practice activities of GJB 5000B verification and validation process domain,the software defect life cycle management process and the appropriate use of methods are studied,the work flow and status of software defects in the whole software life cycle are analyzed,and the corresponding measures are put for-ward for the management of invalid defects that are easily ignored in practice and cross-functional defects. The soft-ware defect report and its application in the software capability maturity process improvement are further analyzed. The study has found that an effective software defect management process can improve team collaboration and communi-cation efficiency,reduce defect management and repair costs,and improve software quality,and thus play a posi-tive role in the continuous process improvement of the organization.