A high-frequency ultra-fine coaxial RF connection member as well as the high-frequency ultra-fine coaxial RF jumper and the receptor connector thereof deliver a high-frequency RF signal by direct electrical contact of an end of a cable central conductor of a coaxial cable with a circuit substrate. Furthermore, the receptor connector of the high-frequency ultra-fine coaxial RF connection member limits a cable end connector through a receptor metal cover, thereby reducing an entire height of the high-frequency ultra-fine coaxial RF connection member, to meet requirement of thinned high-frequency ultra-fine coaxial RF connection members.