The invention discloses a mobile socket and a cover plate used thereon. The mobile socket comprises a bottom box, a panel and modules, each module comprises a negative electrode tab, a positive electrode tab and a ground wire tab, the panel comprises jacks and a holding grooves, the holding grooves are internally provided with indication lamps, negative electrode contact shrapnels are arranged atthe position of the negative electrode tabs, negative electrode contact shrapnels are arranged at the positions of the positive electrode tabs, the leads of the indication lamps are electrically connected with the positive contact shrapnels and the negative contact shrapnels, and the two contact shrapnels are both fixed at the bottom portion of the panel; the positive electrode tabs are coated with a positive electrode safety door, the negative electrode tabs are coated with a negative electrode safety door, the two safety doors are moved towards the same direction, one ends of the safety doors are provided with wedge-shaped surfaces, the other ends of the safety doors are provided with clamping plates, the clamping plates on the two safety doors are butted against to each other, the two safety doors are reset through springs, and the bottom portions of the safety doors are provided with V notches. The mobile socket is connected with the cover plate, the indication lamp detects the stability of the contact of the plug and the tabs, the two safety door are moved by applying pressure, and the cover plate can keep the socket clean.