The paper reported on results of the exploratory fishing of Chinese large scale trawlers since April 2000 in the open sea of the southeast Pacific adjacent to exclusive economic zone of Chile and the basic situation of commercial exploitation after 2003, and also discussed the prospects of commercial exploitation. It points out that the meteorology and o ceanic condition are favorable to operate all the year round in the exploratory fishing area; the status of jack mackerel resources is stable for sustainable exploitation. The fishing fleet of China has got profit since 2003, and there is certain potential of increasing production. However, the equipment conditions of Chinese fishing vessels are timeworn and it. s become the bottleneck to enhancing profits. Finally, the paper suggested that for the sustainable development of pelagic fishery of China, the government should pay more attention to the fishery policies on international fishery co operation and international competition.