The invention relates to the technical field of the plug and socket, especially a dustproof socket capable of stabilizing a plug. The dustproof socket comprises a socket body, a mounting cover is fixed on the socket body, an opening is formed on the mounting cover, a sliding chute is arranged at each of two ends of the inner side of the opening, and a baffle plate can be slidingly arranged in eachsliding chute; the opening is opened when the baffle plate retracts to the sliding chute, and the opening is closed when the baffle plate stretches out the sliding chute; an elastic reset mechanism is connected between the baffle plate and the mounting cover; the elastic reset mechanism is used for driving the baffle plate to maintain the state of stretching out the sliding chute; a gap is arranged on the outer end surface of the baffle plate, a mounting slot is arranged in the gap, a check block is slidingly arranged in the mounting slot, and an elastic reset device is connected between thecheck block and the internal bottom end of the mounting slot, and the elastic reset device is used for driving the check block to maintain the state of extending out the mounting slot. The dustproof socket disclosed by the invention not only can play the prevent effect, but also can play the stabilization effect on the plug when the plug is connected to the socket.