Abstract: This thesis aims to introduce the developing process and prensent situation of traditional rice-fishsymbiosis system in Qingtian,which has a long history of 1200 years and profound cultural deposits.The thesis also provides some insights into the adaptive conditions,historical background as well as the technological principles of fish-culture-in-paddy-field system.With the construction of fish-culture-in–paddy-field ecological base,and the appilication of new culture techniques as well as the accessory technologies,traditional farming-feeding environment has been opitimized,where farmers can culture fish for 1-2 quarters anually and meanwhile sustain rice prodution.Per unit area yield of fish has increased more than 145.6 kilograms with the net income of per mu increasing more than 1500 yuan without using any pesticide or chemical fertilizer,which finally brings about pollution-free ecological agriculture and the way to enhance agricultural effectiveness and farmers’ income.Besides,this thesis also makes an analysis of the economical,ecological and social benefits that has been achieved.