A USB socket includes a socket body, an upper cover, at least one USB interface disposed in the socket body, and a power supply conversion structure for converting an external power supply to a power supply suitable for output of the USB interface. A USB jack is disposed on the upper cover at a position corresponding to the USB interface, the upper cover is detachably mounted on the socket body, the USB interface is mounted at a lower side of the upper cover, and when the upper cover is mounted to the socket body, the USB interface inserts into the socket body. A moving contact is electrically connected to the USB interface, a fixed contact electrically connected to the power supply conversion structure is further disposed in the socket body and the moving contact is driven to be in contact conduction with the fixed contact.