Radio-frequency coaxial connector and board-to-board radio-frequency coaxial connector combination

The invention discloses a radio-frequency coaxial connector which is used for transmitting a radio-frequency signal, wherein the radio-frequency coaxial connector comprises an outer conductor, a base, a dielectric body and an inner conductor, wherein the dielectric body is fastened to the inside of the outer conductor; one end of the inner conductor is fixed on the outer conductor through the dielectric body; the other end of the inner conductor is located in the base; the inner conductor comprises a body, a floating part, a connecting pipe and a plurality of elastic spring wires; the body is fastened to the inside of the dielectric body; the floating part is connected with the body through the connecting pipe; two opposite ends of each elastic spring wire are respectively fixed on the body and the floating part to establish a radio-frequency signal transmission channel; the elastic spring wires elastically deform to realize the position tolerance compatibility in the horizontal direction and the height direction; the floating part is located in the base; and radial runout of the radio-frequency coaxial connector is calibrated through deflection.