The embodiment of the invention provides a rule change processing method and device for a smart contract. According to the method, one user making a smart contract generates to-be-changed service rulerelated information by using a rule engine and deploys the to-be-changed service rule related information to a rule running server; and the rule operation server calls the blockchain gateway, and theblockchain gateway sends changed service rule related information to each node after receiving the change confirmation information of all participants, so that each node stores the changed service rule related information in a respective account book. According to the method provided by the embodiment of the invention, the service rule engine can be integrated in the intelligent contract, so thatservice personnel can conveniently and simply formulate the service rule. After the service rule is formulated, the service rule can be stored in a blockchain account book, and in addition, the change of the service rule must be confirmed by all related participants to update the service rule, so that the situation that the service rule is maliciously tampered is avoided, and the transaction security is improved.