本文主要介绍线性分组码的编码的基本原理。论述了汉明码及循环码的编、解码原理和方法。简要说明了线性分组码的差错特性；详细分析了（8，4）循环码的编码和解码过程，并设计出了（8，4）循环码的编码电路和解码电路。-This paper describes the linear block code encoding of the basic principles. Discusses the Hamming code and cyclic code encoding and decoding principles and methods. A brief descr iption of the error characteristics of linear block codes　detailed analysis of the (8,4) cyclic code encoding and decoding process, and design of the (8,4) cyclic code encoding circuit and decoding circuit.