Data transmission method for Internet of Things and network node

The invention provides a data transmission method for the Internet of Things and a network node. The data transmission method for the Internet of Things comprises the steps that the network node mixes various types of data corresponding to the same application, so that mixed data are obtained, the network node obtains the complexity of the mixed data, the network node selects one of paths corresponding to the application to serve as a target path, the network node obtains the transmission cost of the target path according to the complexity, the network node judges whether the transmission cost is smaller than a preset threshold value, and the network node transmits the mixed data according to the target path if yes. According to the data transmission method for the Internet of Things and the network node, the network node obtains the complexity of the mixed data, so that the target path with the transmission cost smaller than the preset threshold value is selected for the mixed data, the purpose of self-adaptive selection of the target path for the mixed data is achieved, the mixed data transmission cost can be reduced by transmitting the mixed data through the target path, and thus route resources can be saved.