Service privacy data transmission method and device, computer equipment and storage medium

The invention provides a business privacy data transmission method and device, computer equipment and a storage medium, the method and the device are applied to enterprise node equipment on a business block chain, the business block chain further comprises mechanism node equipment, and the method comprises the following steps: acquiring a data ciphertext of business privacy data; the data ciphertext is uploaded to a service block chain for uplink storage, so that after the mechanism node equipment analyzes the data ciphertext, pre-stored identity information is uploaded to an identity chain for data access verification, and a verification result fed back by the identity chain is obtained; if the verification result is that the verification is passed, generating a key ciphertext of the service privacy data; and uploading the key ciphertext to a service block chain for uplink storage, so that the institution node equipment decrypts the data ciphertext according to the key ciphertext to obtain the service privac