The invention relates to a method of realizing the fast transmission and reception of multimedia data. The method comprises the following steps: a server side intercepts a control protocol port; a client side initiates communication link to the control protocol port of the server side; the client side sends control message to the server side; the server side responses the request message of the client side, if both the server side and the client side support fast transmission and adopt out-of-band transmission, the client side is connected with a transmission control protocol port for the fast transmission of the multimedia data at the server side, and builds a transmission control protocol channel for the fast transmission of multimedia data; after the server side and the client side finish the normal interaction of the control protocol messages, the server side tries to transmit the media data to the client side through the transmission control protocol port for the fast transmission of the multimedia data; the server side transmits bit stream according to the normal flow after the transmission is finished. The method of the invention adopts a TCP fast transmission media, and utilizes the sliding window characteristic of the TCP; therefore the band width can be fully utilized, and the network packet loss can not be caused because the transmission speed of the data packet is not controlled.