According to the principle of PDCA cycle in SG aging management,this paper explains the establishment of aging management system,the operation and control(mainly water chemistry control),and the check,inspection,evaluation and maintenance of steam generator(SG) in Qinshan Nuclear Power Plant(QNPP).With the implementation of these measures,the aging and degradation of SG in QNPP are managed effectively.The SG of QNPP are still in good condition after 16-years of operation.