Embodiments of the present invention provide a data transmission method, a data transmission apparatus, a processor, and a mobile terminal. The data transmission method includes determining, by a mobile terminal, whether to use multiple data channels to transmit to-be-transmitted data. The method also includes if determining to use the multiple data channels to transmit the to-be-transmitted data, selecting, by the mobile terminal, at least two activated data channels for the to-be-transmitted data according to current traffic information and service quality information that are of the multiple data channels. Additionally, the method includes using, by the mobile terminal, the selected at least two data channels to transmit the to-be-transmitted data.