Abstract: To investigate the effects of rice-duck integrated farming,a total of 110 Chaohu spot ducks were randomly assigned into four groups and stocked at four densities,0,10,20 and 30 ducks/667m^2,respectively.After a 58 d rice-duck integrated farming,good effects of this technology on deinsectization,weed eradication and disease control of paddy field were observed.Good duck growth and the highest rice yield were achieved when the stocking density was 20 ducks/667m^2.