Abstract: In the context of risk society,the risk prevention and control mechanism of biosecurity law aims to balance the internal tension among the research and application of modern biotechnology,the development and utilization of ecological environment,ecological protection and public health security,embodying and following the value concept of biosecurity law.The risk prevention and controlmechanism consists of risk assessment,management and communication,and its effective operation should be based on the risk assessment of scientific judgment and the appropriate use of "cost-benefit" analysis to realize the optimal path choice of risk management,avoiding  the one-dimensional path dependence in order to achieve comprehensive risk communication.

Key words: biosecurity, risk prevention and control, risk assessment, risk management, risk communication