The invention discloses a transmission method of a rich media scene in a broadcast network, which comprises the following steps: (1) at a sending end, update and an initial scene or a current scene synthesized at a previous time are synthesized into a new current scene, the initial scene or the current scene synthesized at a previous time is replaced, new rich media scene data with the un-synthesized update is formed, and the currently sent rich media scene data is replaced; and (2) the initial scene and the current scene adopt a scene channel for transmitting by broadcasting in a file mode; and the un-synthesized update adopts an update channel for transmitting in a flow mode. Compared with uniform transmission, when split transmission is adopted, the transmission bandwidth is saved, andsimultaneously the transmission burden is reduced. The data processing amount of a receiving end is reduced, thereby lightening the burden of the receiving end.