用软件实现CRC校验码计算很难满足高速数据通信的要求， 基于硬件的实现方法中， 有串行经典算法LFSR,电路以及由软件算法推导出来的其它各种并行计算方法。以经典的LFSR,电路为基础， 研究了按字节并行计算CRC校验码的原理.-Implemented in software CRC checksum calculation is difficult to meet the requirements of high-speed data communications, hardware-based implementations, there are classic serial algorithm LFSR, circuits and software algorithms derived from the other kinds of parallel computing. To the classic LFSR, circuit-based, study by the CRC byte parallel computing principles.