A novel media access control protocol is proposed based on EPON considering of the character of orthogonal frequency-division multiplexing passive optical network. Multi-point control protocol, control message format and the priority of services are designed and a dynamic bandwidth allocation algorithms is proposed, which supports multi-service access and ensures quality of service distinguishing user level in specified case. The proposed algorithm uses two-level mechanisms and the allocating progress can be divided into two steps-schedule for different priority of services and schedule for different level optical network unit. The proposed protocol is simulated and the results of delay, packet loss ratio and throughput performance show that the proposed protocol guarantees the quality of service requirements for different services excellently, and meets quality of service requirements of multi-service access.