Improving and perfecting the individual income tax system is one of the important contents of the Chinese dual tax system and the focus of tax reform for a long time.Personal Income Tax Law passed by National People's Congress in 1980 and a succession of five changes since then is seldom seen in our legislation history.Personal income tax model transition,level and structure of tax rate adjustment,deducted reform,the improvement of tax self-declaration,and legislative process democratization are the focus of individual income tax system reform.