情势变更原则作为契约严守原则的例外,有利于保证合同当事人利益的实质公正。但是我国合同法中所规定的情势变更应该与商业风险、不可抗力以及诚实信用原则等厘清界限。以保障情势变更原则在司法实践中的准确运用。 As an exception to the principle of strict adherence to contracts, the principle of changing circumstances is conducive to ensuring the substantive fairness of the parties to the contract. However, the change of circumstances stipulated in the contract law of our country should be clearly defined with the business risk, force majeure and the principle of good faith. So as to ensure the accurate application of the principle of changing circumstances in judicial practice.