The present invention provides a data terminal with a connection structure of a universal serial bus (USB) interface. The structure includes: a USB interface, a guide rail element, an elastic element, and a limit element; a protrusion is disposed on at least one side of the USB interface; the guide rail element includes two vertical faces disposed opposite each other; the USB interface is located in an accommodating space formed by the two vertical faces; a guide rail is disposed on each vertical face in a hollow manner; the protrusion on the USB interface extends out of the accommodating space from the guide rail; and in the two vertical faces, a connection terminal is disposed on an outer side of at least a first vertical face.