This paper focuses on China and South Korea intermediate goods trade in services. Analyzing China and South Korea trade in services overall development situation, using the service trade competitiveness index(TC index) to measure and compare the level of competitiveness of China and South Korea trade in services and service departments. Through the measurement of the global value chain participation degree and the vertical specialization share, analyze and evaluate the participation of the various sectors of the service trade of China and South Korea in the global value chain degree and professional share. In addition, use gravity model based on panel data to analyze the factors which influence the service trade between China and South Korea.