Technical field and application field The deep-sea RF cable assembly is mainly used in the technical field of optical transmission systems, specifically in the manufacturing of wires, cables, optical cables and electrical equipment. Technical principles and performance indicators This deep-sea RF cable assembly includes a coaxial connector and a coaxial cable fixedly connected thereto. The coaxial connector includes a plug end and a socket end, and its structure is support ring one, support ring two and support ring three from the axis radially outward. These support rings are provided with annular grooves, and sealing rings are installed in the grooves. In addition, an embedded structure is formed between the plug end and the socket end by assembling the fan-shaped block and the fan-shaped groove, and the arc block and the arc groove to ensure the stability of the structure after connection. The outer surface is fixedly connected by screw holes, which increases the firmness of the connection and prevents b