The invention discloses a differential signal connector. The differential signal connector comprises a plurality of terminal modules and a plastic body, wherein each terminal module comprises a terminal seat, a signal terminal and a ground terminal, the signal terminal and the ground terminal are integrally fixed with the terminal seat, a conductive polymer material layer further fixedly covers the end surface of the terminal seat and is conducted with all ground terminals to form a full-package shielding structure having a shielding function on the signal terminals, the plastic body is provided with a plurality of plug-in grooves, a plurality of first terminal holes and a plurality of second terminal holes, the plurality of first terminal holes and the plurality of second terminal holes pass through the plug-in grooves, the terminal modules are fixedly inserted to the plug-in grooves of the plastic body, and contact parts of the signal terminals and contact parts of the ground terminals of the terminal modules separately extend to the first terminal holes and the second terminal holes. Through the cooperation of the conductive polymer material layer and the ground terminals, the problems of signal interference, crosstalk and the like generated during high-speed transmission of the signal terminals are solved, all noise can be shielded in the outside, the high-speed signal transmission stability of the signal terminals is ensured, and the high-frequency performance of a product is relatively high.