Video service transmission method and device

A video service transmission method and device in the technical field of communications. Data in a video data frame may be shunted into at least two sub-streams according to a mapping relationship between the importance of the data and the sub-stream, and data on the sub-streams is mapped to carriers corresponding to the sub-streams for transmission according to a port number corresponding to the sub-stream. Since a network can use different processing methods for data on different carriers, the video service transmission method and device can give priority to ensuring the reliable transmission of a video data frame with high importance, thereby enhancing the service experience of a video user when transmission resources are limited.