Abstract:The ecological risk of transgenic herbicide-resistant rice(Oryza sativa) has been seriously concerned by professional and public. Evaluating the size of ecological risk and the amount of benefit has important reference value in risk precaution, distinguishing right from wrong, weight the advantage and disadvantage, and scientific policy-making. The previous researches emphasised on individual risk analysis and mainly adopted the simulated environment, but there was less on comparison of risk and benefit and deficient on global and integrated analysis. This paper has comprehensively analysed the ecological risk and benefit of transgenic herbicide-resistant rice, and put forward technical approaches to control the ecological risk, that has vital pratical significance in promoting healthy and steady development of transgenic herbicide-resistant rice in China.