The invention discloses an intra-network video buffering method based on a combined buffering architecture. The technical solution for realizing the method includes the following steps: in a network which uses a combined buffering architecture, preserving a total buffering space with a part having a proportion of [alpha] to buffer the most popular video, and using the rest of the space to ensure that all videos buffer in the network; and after the completion of the video buffering, on the basis of dynamic changes of a video request mode and link state information, finding the best video source node for a video request party. According to the invention, the method effectively addresses the problem of intra-network video buffering, can ensure reliable and efficient saving and invoking of video data in a mobile network, saves system broadband, and efficiently lower network time delay cost.