A cable connector assembly, comprising comprises: a plurality of contacts (2) defining a plurality of first contacts (27) which may be used as power contacts and a plurality of second contacts (28), an insulative housing (1) molding outside the contacts (2), a flat-shaped cable (3) connecting with the contacts (2), the cable (3) comprises a plurality of coaxial wires arranged along the level direction, each coaxial wire comprises a plurality of inner conductors (30), two inner conductors (30) are connected with a first contact (27), and one inner conductor (30) is connected with a second contact (28), a metallic shell (4) shielding outside the insulative housing (1).