The invention discloses a static risk assessment method for a power grid in severe weather. The probability of failures of the power grid and static safety risks caused by the failures in the severe weather can be analyzed, and support is provided for the discovery of potential risks of the power grid in the severe weather and the advanced reduction of operation risks and failure loss of the power grid. According to the method, the probability and the seriousness of the failures caused by the severe weather are taken into comprehensive account, a disclosed static safety index can be used for the static safety risk assessment of the power grid in the severe weather in different regions, an effective analysis tool for finding weak links of the power grid in static safety in the severe weather, and favorable support for the early-warning of the failures in the severe weather can be provided, and the failure loss, caused by the severe weather, of the power grid can be reduced.