Chronic obstructive pulmonary disease(COPD) is a usual disease throughout the world. The pathogenesis of COPD is complicated including oxidants/antioxidants imbalance, proteases/antiproteases imbalance,inflammation and apoptosis. Oxidants/antioxidants imbalance is one of the major factors in the pathogenesis of COPD, but the full mechanism of molecules and processes involved still remains unclear. Proteomics is the study of global analysis of all the proteins, which reflects more accurately on the dynamic state of a cell,tissue,or organism, m...