The invention discloses a block chain interface configuration method based on communication security authentication. Communication user, the security authentication device includes a controller, a storage module, a signature module and a verification module, the controller, storage module, signature module and verification module are connected in parallel with the controller, and the configuration module includes a block chain and a block chain The blockchain node is connected to the blockchain in parallel. By connecting the user system to the security authentication device, the communication request can be signed and authenticated. At the same time, the blockchain node is generated through the blockchain to connect the two users separately. , thereby avoiding configuration disorder, ensuring the stability of communication, and effectively improving communication security, effectively improving communication efficiency and information security, and facilitating use and promotion.