Data transmission method and device

The invention relates to the Internet technology field, particularly relates to a data transmission method and device and aims to solve problems of network transmission resource waste and data transmission efficiency reduction caused by repeatedly transmitting one same data definition for multiple times under a present data interaction mode when multiple data corresponding to the one same data definition are transmitted. The method comprises steps that the multiple to-be-transmitted data and data definition of each data are determined by a first node; the data definition of the at least two data are one same type; the data definitions are taken by the first node as a first data set, and the multiple data are taken as a second data set which is transmitted to a second node; the one same data definition only exists in the first data set for one time. 本申请涉及互联网技术领域，尤其涉及种数据传输方法及装置，用以解决在现有的数据交互格式下，当传输同数据定义对应的多个数据时，需要对同数据定义进行多次重复性的传输，从而浪费了网络传输资源，降低了数据传输效率的问题。本申请实施例提供的种数据传输方法，包括：第节点确定待传输的多个数据及每个数据的数据定义；其中，存在至少两个数据的数据