[Aim]  Euchirinae is a subfamily of Scarabaeidae, or scarab beetles. At present, two genera and eight species of Euchirinae have been found in China. These include six species from the genus Cheirotonus and two species from the genus Propomacrus, all of which have been listed as national second-class protected animals in the 2021 edition of the ‘List of wild animals under priority conservation’. The species of the subfamily Euchirinae distributed in China are rare, and the biological information of the subfamily Euchirinae has been difficult to obtain for a long time, resulting in slow progress in the collection and taxonomic research of systematic morphological information between groups. The identification of closely related species is also very difficult, which poses certain obstacles to the inspection work of customs and public security departments. Based on geometric morphometrics, our study quantitatively analyzed the morphological characteristics of male and female Euchirinae samples in China, revealing the morphological differences among 8 species of Euchirinae distributed in China. We also screened additional morphological characteristics for classification and identification. This study offers innovative approaches for improving the customs inspection process. [Methods]  Based on geometric morphometrics, we compared the outer contours of the protibia of eight species of Euchirinae, and the morphology of the left outer contours of the pronotum and elytron in both males and females, using principal component analysis (PCA), canonical variance analysis (CVA), and discriminant function analysis (DFA). The morphological differences between male and female individuals were analyzed, and the identification features recorded. [Results]  Based on the PCA results, we found that the morphological changes of the protibia in the intergroup segment of Euchirinae were concentrated in the curvature of the spines and tibia. Whereas variation in the pronotum resulted from the expansion of the posterior horn and the reduction of the aspect ratio. Finally, we found elytron variation was due to extension of the shoulder angle, the interaction of the elytron near the scutellum, and a reduction in the aspect ratio. The CVA and DFA results showed a significant difference in the morphology of the male protibia between species. Of the test groups, 93% (26/28) achieved a 100% discriminant accuracy rate between test groups. Finally, CVA analysis showed there was no intersection between the elytron morphology of the eight female long-armed scarabs. [Conclusion]  The morphological characteristics of the male protibia differed significantly between Euchirinae species. Furthermore, the elytrons of female samples exhibited stronger interspecific differentiation. Geometric morphometrics can facilitate the identification of morphological differences between Euchirinae species in China and be used for interspecific identification.