We analyzed seasonal and interannual variability of fishing ground of Trachurus murphyi, relationship between CPUE and SST, according to the statistical data of fishing yield of Chilean jack mackerel (Trachurus murphyi) in Chinese vessels, the data of SST (sea surface temperature) obtained by satellite remote sensing from 2005 to 2008. The results showed that seasonal variability of central fishing ground in 2005 and 2006 is similar, but it had a large change in spring in 2007 and 2008, while there are fishing grounds in the west part of the Southeast Pacific Ocean. The optimum SST of fishing ground was 13-15℃ from 2005 to 2008 and it increase with months, optimum SST of fishing ground of autumn in 2007 and 2008 is lower than it in 2005 and 2006. The average CPUE per month and barycenter corresponding SST shows the significant negative correlation from 2005 to 2007.