The invention discloses equipment about a vehicle-mounted charging USB interface. The equipment comprises a plug and a socket connected to one end of the plug, wherein the socket is rectangular; jacks are arranged in the upper surface of the socket and include a 2A USB jack, 1A USB jacks and a lighter jack; the 2A USB jack and the 1A USB jacks are A-type jacks and the sizes of the A-type jacks are 2.0; a rubber core in the middle of each A-type jack is white or black; and the lighter jack generates an ignition signal through an ignition signal sensor for a non-contact electronic ignition system and transfers the ignition signal to a lighter. Each multiperture socket of a cigarette lighter has maximum output power and maximum through current; and the total current of used automotive electrical appliances cannot exceed the maximum current value and the maximum output power of each multiperture socket of the cigarette lighter, which is an important indicator for ensuring that each multiperture socket of the cigarette lighter normally works and is safe in use. One jack corresponding to a traditional car cigarette lighter is built in a car, and only one jack cannot meet the requirements of people in modern society.