With the continuous expansion of the scale of industrial IoT, fog computing communication network has been widely used, and the scale of its transmission data has also increased exponentially, but the existing fog computing communication network has problems such as poor data transmission security and cumbersome encryption and decryption. Aiming at these problems, this paper proposes a transmission method for fog computing communication networks that incorporates blockchain structure. First, the method constructs a dynamically updated word vector model by minimizing the loss function to map the plaintext data in the fog computing network to the corresponding word vector space; then the traditional blockchain data structure is improved and the corresponding word vector data is transformed into the corresponding block data, which facilitates a better transmission of the data in the network; finally, the nodes and the network architecture of the fog computing network are designed to further guarantee the security and integrity of data in network transmission. Finally, the nodes and network architecture of the fog computing network are designed to further ensure the security and integrity of data transmission in the network. The experimental results show that this method has great advantages over the existing methods in terms of data transmission efficiency, security and integrity.