Based on the production data from Chinese squid jigging vessels in the waters of Exclusive Economic Zones of Argentina during 2008 to 2011 and sea surface temperature (SST), the catch composition and distribution of fishing ground are analyzed. The relationship between fishing ground and SST is analyzed and the monthly optimum SSTs of fishing ground are deduced by use of the software Marine Explorer and the Kolmogorov–Smirnov test. The result showed that the production is relatively high but with fluctuation during February to April. The catch is mainly concentrated in the waters near 44?-52?S and 60?-65?W, accounting for 70% of the total production. There is a significant difference in the monthly distribution of fishing ground, and the fishing ground moves westwards during February to August. The monthly optimum SSTs of fishing ground are 11-14.5℃, 9.5-12℃, 9-10℃, 9-9.5℃, 7-13℃, 7.5-9℃ and 7-10℃, respectively. The result of Kolmogorov–Smirnov test demonstrated no significant difference between SST and CPUE. It is suggested that the catch data including biological data is collected in details, and the annual changes of resources and fishing ground for I. argentinus is needed to be carried out in combination with different spawning populations, to make a basis on sustainable exploiting fishery resources in Southwest Atlantic Ocean.