Abstract: Producer service industry connects manufacturing industry and service industry, and it belongs to the high-end part of knowledge and service intensive in the service trade. Its development plays an important role in promoting China's position in the global value chain. Generally, China's producer service trade shows an upward trend, but affected by economic growth, it is prone to cyclical fluctuations. At present, China's exports mainly focus on the low and medium technology complexity. Based on the comparison of export technology complexity with those of developed countries and BRICs countries, it is found that China's producer service trade is still in the growth stage, in the middle and low end of the Global trade, and there is still a large space for development. Through the panel data analysis of China and the United States, Japan, the United Kingdom, Luxembourg, Russia, Brazil, South Africa and India from 2005 to 2017, it is confirmed that the key to improve the technical complexity of China's producer service trade is to stimulate the innovation ability of enterprises, create an economic environment for sustained and stable growth, and improve the accumulation of human capital.