Abstract: To medicinal herbs for medicinal materials market circulation Eupolyphaga micro traits study,to explore the difference of ground beetle and its confused species,through consulting data,investigating the market eupolyphaga varieties,use of TCM character identification method for different parts of the ground beetle use a stered microscope,biological microscope,scanning instruments such as image acquisition,the depth of field and use the Photoshop CS5 software synthesis high-definition micro traits images to identify its research,the experimental results show that there are obvious differences between the oral organs,the edges of ventral and dorsal plates,the upper plate of anus,reproductive plates,antennae,the ratio of monocular space and compound eye space,the single eye,compound eye,the tibia and tarsus of the forefoot,the claws,the tail whiskers,the dorsal nail and the setae of the ventral nail.

Key words: Eupolyphaga sinensis Walker.or Steleophaga plancyi(Boleny), character identification, identification of micro-characters