Provided is a radio frequency connection device, which comprises a radio frequency connector, and a lengthening component. The radio frequency connector is used for electrically connecting a transmission line; the radio frequency connector comprises a housing conductor, a center medium and an inner conductor, wherein the inner conductor is supported in the housing conductor through the center medium, and partially extends outwards; the two ends of the lengthening component are connected with the extended part of the inner conductor of the radio frequency connector and the transmission line respectively, and the lengthening component is used for lengthening the inner conductor part of the radio frequency connector. The invention also provides a manufacturing method of the radio frequency connection device. Through the connecting mode of the radio frequency connector and the lengthening component, the inner conductor portion of the radio frequency connector can reach the shortest length;the lengthening component is designed as a standard component according to common length interval and based on arithmetic progression, so that through the radio frequency connector and the lengthening component, materials are saved, and during use, flexible match can be realized; and meanwhile, research and manufacturing cost can be reduced, and the problem of waste of material of the radio frequency connector is prevented.