One or more embodiments of the present specification provide a method for implementing privacy protection in a blockchain, a node and a storage medium, the method comprising: a first blockchain node receiving a transaction initiated by a client, the transaction having one or more corresponding smart contracts; the first block chain node executing the transaction to obtain receipt data, wherein thereceipt data comprises receipt sub-data corresponding to each smart contract; when determining that the first smart contract corresponding to the transaction has the authority protection identifier,the first blockchain node sets a corresponding access condition for the receipt sub-data corresponding to the first smart contract when storing the receipt data; And when the first block chain node responds to an access request for the receipt sub-data corresponding to the first smart contract, determining that the access condition is met.