The evolution of risk refers to the process of risk changing over time. The causes of risk evolution are diverse. On the one hand, the risk-bearing environment is constantly changing, the changes in risk factors continue to accumulate, and the complex interrelationships between risk factors act as catalysts, causing the risk to possibly undergo magnitude leaps and sudden changes. On the other hand, as the state of the risk-bearing subject continues to advance, the risk pathway will also change, making some originally secondary risk factors become the main factors, leading to a sharp change in risk. Therefore, for activities with a long duration, it is very necessary to deal with risks from an evolutionary perspective.