The experiment was carried out to cultivate the production environment for organic rice by means of no-tillage and light harrow technology.Through setting different population level of duck,effect of the rice-duck farming technology on the weeds increment and reduction,pest insect communities in the field and natural enemy communities was studied.The results showed that controlling weeds by duck was a long-term and continuous process.The prosperity and perish of rice paddy weed can be controlled and the eco-balance between the rice and weeds can be maintained when the population of 15 ducks per 667m2 adopted.Integrated rice-duck farming technology was optional for destroying the rice pest.It was not as effective as the chemical pesticides but had apparent choice for destroying rice pest.Integrated rice-duck farming technology has certain positive effect on the natural pest insects in the rice field.There was a trend of decrease of natural enemy communities without the devastating effect of chemical pesticides.