In this study,the samples of Ommastrephes bartramii and Gonatopsis borealis were collected by the Chinese squid jigging vessels during September to November in 2018 in the high seas of north Pacific Ocean (41°05'N-43°45'N,154°05'E-159°43'E).Their beaks'characteristics were measured and analyzed. The results showed that the two species had extremely significant differences in mantle length and body mass. The principal component analysis showed that upper crest length(UCL) was the best for representing the beaks' external morphological features of O.bartramii, and upper crest length(UCL) and lower lateral wall length(LLWL) were the best for representing the beaks' external morphological features of G.borealis. The AIC(Akaike's information criterion) showed that:The relationships between ML and UHL, LHL, LLWL, LWL were best described by power function for O.bartramii, and relationships between ML and UCL, ULWL, UWL, LCL were best described by logarithm function for O.bartramii; The relationships between ML and UHL, LRL and LLWL were best described by power function for G.borealis,relationships between ML and UCL and LCL were best described by exponential function for G.borealis, the relationships between ML and URL, ULWLand LHL were best described by logarithm function for G.borealis. Stepwise discriminant analysis showed that the correct discrimination rates of upper and lower beaks were 92.70% and 84.50%, respectively. Meanwhile,the discriminant equations were built. The results indicated that the external shapes of beaks can be used to identify these two kinds of squids.