Encryption communication method based on block chain network

The invention relates to encrypted communication, in particular to an encrypted communication method based on a block chain network, which comprises the following steps of: generating a secret key, respectively holding a sender and a receiver, encoding information to be sent by the sender, encrypting, transcoding the encrypted characters, dividing transcoded data into a plurality of parts according to the information amount, and transmitting the information to the receiver; the method comprises the following steps that: a sender performs data splicing on each part, the sender constructs the spliced data into an Ethereum transaction and sends the Ethereum transaction to a random address, and a receiver collects transaction data according to an information length, performs reverse complete recovery, obtains transcoded data, performs decryption by using a secret key, performs decoding to obtain an original text, and completes encrypted transmission of information; according to the technical scheme provided by th