Addressing the challenges of high cost, bulky platforms, and highly corrosive environments in offshore wind power collection systems, this study focuses on analyzing two mainstream configurations: AC collection and DC collection. It explores the potential of medium-frequency AC collection for reducing equipment volume and its associated loss issues, while comparing the advantages and disadvantages of parallel and series DC collection schemes. Key technologies for lightweighting offshore converter platforms are investigated in depth, including optimization of MMC capacitors, hybrid rectifier technology, application of new materials and structural optimization, and tailored anti-corrosion strategies for different marine corrosion zones. It is suggested that future efforts should explore hybrid solutions integrating AC/DC advantages and continuously advance innovations in lightweighting and anti-corrosion technologies to enhance the economic viability and reliability of far-shore wind power.