Coding method and device, computer equipment and storage medium

The invention is applicable to the field of computers, and provides an encoding method and device, computer equipment and a storage medium thereof. The encoding method comprises the steps of receivinga channel source code to be encoded, and generating a first check graph; expanding the check nodes in the first check graph by adopting an error correction code to obtain a second check graph; combining the two second check diagrams to obtain a third check diagram; mapping the third check graph into the first check matrix to obtain a supervision matrix; and calculating to obtain a generation matrix according to a formula G * HT = O, and encoding the channel source code to obtain a channel code; designing check graphs, subjecting the check nodes to efficient linear grouping or convolutional code check matrix extension to eliminate multiple edges; enabling the variable to correspond to the check node to obtain the required check matrix, so that the coded channel code has the decoding performance similar to the Shan