Under the background of "carbon peak" and "carbon neutralization" commitments, offshore wind power has developed rapidly with its high utilization hours and rich total resources. However, the high cost, difficult operation and inconvenient construction of offshore wind power transmission have become the main bottleneck restricting its rapid development. Seawater desalination technology can effectively adapt to wind power fluctuations due to its flexible operation characteristics. The use of offshore wind power on-site consumption for seawater desalination can improve the utilization rate of wind power and simplify the transmission and distribution links, which can provide a new idea for the application and development of offshore wind power. Firstly, combined with the grid connection mode of offshore wind power and the process structure of seawater desalination system, the working principles of offshore wind power transmission and fresh water transmission are analyzed respectively. Secondly, the technical and economic differences between offshore wind power transmission and water transmission systems are sorted out by comprehensively considering 7 performance indicators such as transmission capacity, transmission distance, and transmission construction cost. Finally, in view of the advantages of seawater desalination technology such as flexibility and economy, the application prospects of offshore wind power-driven seawater desalination technology in new energy consumption, industrial cleaning and diversified development of wind power are discussed.