A coaxial cable connector comprises: an inner sleeve having a first outer flange and a first surface; a nut coaxially arranged with the inner sleeve, comprising a first inner flange and a threaded portion, the threaded portion of the nut engages with a threaded surface of a connector of an electronic device; a first inner ring coaxially arranged with the inner sleeve, comprising a ring portion and a plurality of elastic portions, one end of each of the plurality of elastic portions comprising a second outer flange disposed between the ring portion and the first outer flange; and an outer sleeve coaxially arranged with the first inner ring and the inner sleeve, wherein when the outer sleeve moves toward the nut, an engaging bump of the outer sleeve presses the second outer flange to enable the second outer flange to move toward the outer surface of the inner sleeve.