The invention discloses an integrated isolation breaker power grid risk evaluation method based on multiple scenes. According to the method, on the condition that the multiple scenes of an integratedisolation breaker in different operation states are acquired through the multi-scene technology, scene risk analysis is respectively carried out; for the static big probability scenes, risks are calculated according to load loss, load interruption and replacement or repair cost of the integrated circuit breaker; for the dynamic small probability scenes, on the condition that corresponding risk indexes are calculated, real-time operation data is combined, influence of scene probability change on the risk is analyzed, and risk evaluation accuracy of the small probability scenes is guaranteed. The method is advantaged in that risk analysis on the multiple scenes of the integrated isolation breaker after multi-scene technology processing is carried out, for the small probability scenes, influence of scene probability change on the risk is analyzed.