A dustproof socket capable of stabilizing a plug of the present invention comprising a socket body, wherein a mounting cover is fixed on the socket body, and an opening is formed in the mounting cover; the two ends of the inner side of the opening are respectively provided with a sliding groove, and a baffle plate is slidably mounted in each sliding groove; when the baffle plate retracts into the sliding groove, the opening is opened, and when the baffle plate stretches out from the sliding groove, the opening is closed; an elastic reset mechanism is connected between the baffle plate and the mounting cover; the elastic reset mechanism is used for forcing the baffle plate to keep in a state of stretching out from the sliding groove.