Cracking,instability and even engineering accidents of a steel structure may be produced during its design,construction,member damage,fire disaster and earthquake.This paper provides a review of stability theory and experiment research on steel compression bars strengthened.A summary of existing work and development on the stability reinforcement of steel compression bars at home and abroad are first introduced.Then theory and experiment research on steel compression bars strengthened with FRP,bonded steel plates and sleeve pipe are described in detail.Finally,the study of strengthening steel compression bars in the near future is prospected.