The utility model provides a RS -232 -C communication interface connector, it is troublesome, time -consuming mainly to solve the attach fitting field fabrication, and the rewelding easily leads to contact failure or broken string to influence signal transmission's problem. It wherein, is connected contact pin and connecting insertion hole rear end and corresponds the lead terminal jack that an inner wall was equipped with the first metal layer respectively including needle -like connector that is equipped with the connection contact pin and the pinhole connector that is equipped with connecting insertion hole, inserts leaded plug in the lead terminal jack, connecting the contact pin rear end and being connected with the first metal layer, the connecting insertion hole inner wall is equipped with the second metal level of being connected with the first metal layer, son lead wire is connected with the terminal pin rear end, and arbitrary person is connected in go between both ends and needle -like connector and the poroid connector, and needle -like connector and pinhole connector rear end are equipped with the rear end cap respectively. The plug -in wiring is adopted with the lead wire in its connector rear end, makes every lead wire and jack on the connector make up wantonly and inserts, satisfies multiplely to make up in succession fast, and convenient to use is swift.