The invention discloses a data transmission method based on dynamic binary tree child-nephew two-channel in an internet classroom. Nodes of the binary tree are divided into logical relationships of father and child, uncle and nephew as well as brothers according to the levels of the nodes, and data are transmitted among the nodes with the logical relationships of father and child, uncle and nephewand the like in parallel at the same time. In the method, the nodes which enter and exit the binary tree are sequentially numbered, and the binary tree structure is dynamically organized, thus realizing regulation update of the dynamic binary tree in the transmission process. By adopting the technical proposal of the invention, data transmission is carried out based on the dynamic binary tree child-nephew two-channel, thus reducing data traffic of the single node and solving the problems of bandwidth occupied by the data transmission in the internet classroom and stability of the transmission.