The USB socket is a universal socket with a safe and electricity, including the main body of the socket. There is a USB parent seat on the main body of the socket, and the USB parent seat has a linkage switch and USB socket. There is a charger module in the socket subject. The input terminal of the charger module is connected in parallel to the output terminal of the linkage switch. The input terminal is connected to the power supply. This utility model attaches multiple USB sockets to the general -purpose switch, and makes the USB socket connect to the city power when it needs to be used. This will not only have a USB plug The USB socket can be charged with low -voltage electrical appliances, and it also has the advantages of making the device not connecting the power for a long time, extending the life of the equipment, saving power, and eliminating hidden dangers.