Based on the statistics of 30 provinces in China from 2003 to 2018, this paper discusses the influence of producer services agglomeration on manufacturing export sophistication in China. The conclusions are as follows. First of all, producer services agglomeration can significantly promote the improvement of China’s manufacturing export sophistication, and this promotion effect can be found in different industries and regions. Secondly, the promotion effect of high-tech producer services agglomeration is higher than that of low-technology producer services agglomeration. The promotion effect of producer services agglomeration in the central and western regions on manufacturing export sophistication is greater than that in the eastern region and the whole country. Finally, neither the financial crisis nor the tax impact will change the effect of agglomeration on the manufacturing export sophistication, but the downward pressure of the domestic economy will restrain the positive effect of producer services agglomeration. In addition, the 15 order lag term of producer services agglomeration can significantly promote the improvement of manufacturing export sophistication. Therefore, it is necessary to actively guide producer services to gather appropriately, especially in the central and western regions, and encourage the exchange and cooperation between producer services and the manufacturing industry, so that the producer services agglomeration can better play its role in promoting the improvement of manufacturing export sophistication.