The invention discloses a portable power source plug and socket combination device. The portable power source plug and socket combination device is characterized in that the device comprises a portable power source plug and an insulation housing, and a socket is connected with a socket fixing part; the socket fixing part is connected to an equipment casing, and the socket is connected with an equipment circuit board through a flexible conductor; a DC output terminal of the power source housing is provided with an inverse-insertion preventing gap, and a locking hole in an inserting end is matched with a fixing hole in the socket fixing part. The portable power source plug and socket combination device is characterized by being good in environmental protection effect and considerable in economic benefit, and being practical and efficient, and the production efficiency is improved, and the portable power source plug and socket combination device is reasonable in design, simple in structure, ingenious in conception and convenient to use.