DATA TRANSMISSION METHOD AND DEVICE

A data transmission method and device, relating to the field of data transmission. A slave device provides a plurality of interfaces for connecting different master devices, realizes the switching ofdifferent interfaces based on a hardware logic control circuit and performs data transmission by means of a target data interface master device matching the master device, thereby satisfying the usagerequirement for a plurality of USB interfaces of the slave device. The method comprises: a housing of a first device (i.e. a slave device in a USB architecture) being provided with at least two datainterfaces, wherein the slave device further comprises a control chip; the at least two data interfaces are connected to the control chip; the control chip is used for receiving a first signal input by a second device (i.e. a master device in the USB architecture) via a target data interface, loading a drive matching the target data interface, and performing data transmission with the second device via the target data inter