Abstract: A QoS solution for CM which is a kind of network-access equipment in HFC network was proposed by analyzing different network QoS mechanisms and studying the DOCSIS1.1 QoS standards in-depth. A model for CM QoS mechanism was designed to ensure providing different QoS for different kinds of IP data, and the function of each module was described in detail. The dynamic service initiation technology was introduced lately, and finally the development of HFC network QoS mechanism was reviewed.