Abstract: Research on roaming management is a very important part for mobile multimedia broadcasting services. However, both OMA (Open Mobile Alliance) and 3GPP (3rd Generation Partnership Project) just give a brief description without further study, all of the signaling for authentication and subscription returning to the home server,which prolongs the transmission time and adds the cost, so the quality of experience may get worse. This paper provides a new approach to optimize the roaming service flow and set the cache on the visiting server to store the keys and subscription information. This approach shortens the transmission time and improves users experience. The calculation and analysis demonstrate that the new approach for roaming management increases the transmission efficiency and makes much better improvement on performance than the existing approach.