【Aim】 To clarify the species, classification status, distribution and potential invasion harmfulness of the snail intercepted in mail from Poland at Beijing port. 【Method】 Both morphological characteristics and DNA barcoding were used to compare and identify the intercepted sample. The morphological characteristics of Helix pomatia were introduced, and also the similar species. The intercept situation quarantine snail in China is discussed. 【Result】 The snail is identified as the quarantine pest, Helix pomatia Linnaeus, 1758, which belongs to class Gastropoda, order Stylommatophora, family Helicidae. 【Conclusion】 The quarantine pests in mail should be paid attention by the customs departments. Our results suggested that the DNA barcoding method is effective in assisting species identification in quarantine routine.