The invention discloses a cable extrusion molding and surface degreasing processing system which comprises an extrusion molding machine (11) and a degreasing device. The degreasing device comprises a shell (1) provided with an inner cavity. A storage box (2) is arranged at the top of the shell (1). A cleaning box (3) is arranged in the inner cavity. The storage box (2) is communicated with the cleaning box (3) so as to supply detergent into the cleaning box (3). A spiral rotating shaft (4) is arranged in the cleaning box (3) so as to wind a cable (10) processed by the extrusion molding machine (11) and drive the cable (10) to rotate spirally; a drying block (7) is further arranged in the inner cavity. The cable (10) can penetrate through the drying block (7) after passing through the cleaning box (3). The cable extrusion molding and surface degreasing processing system can carry out efficient degreasing treatment.