The invention relates to a coaxial cable jumper and a welding manufacturing method thereof and in particular relates to a radio frequency coaxial cable jumper used in a third generation data mobile communication 3G system and a welding manufacturing method thereof. The jumper comprises a coaxial cable, connectors and a thermal shrinkable sleeve; both ends of the coaxial cable are provided with the connectors, and each connector comprises a connecting sleeve, a turnbuckle, a seal ring, a retaining ring, an insulating spacer, an insulator, a contact pin and a dust-proof cap respectively; and the turnbuckle is arranged between a turnbuckle positioning step and a retaining ring mounting groove. The seal ring is arranged between the turnbuckle and the turnbuckle positioning step, the retainingring is arranged in the retaining ring mounting groove, and the insulator is arranged in the connecting sleeve. The insulating spacer is sheathed on an internal conductor end of the coaxial cable, the contact pin is riveted on the internal conductor end of the coaxial cable and inserted in the insulator, and two connecting sleeves are sheathed outside an external conductor striped off sheath on both ends of the coaxial cable and welded together by the soldering tin wire; the thermal shrinkable sleeve is encapsulated at an soldering tin joint between the connecting sleeve and each end of the coaxial cable; and the dust-proof cap is screwed on the turnbuckle.