Abstract: OBJECTIVE To provide experimental basis for the comparative study of Calyx Kaki and its immature products. METHODS The morphological identification, microscopic identification, TLC and HPLC identification were adopted to distinguish these two materials. RESULTS There were obvious differences in morphological identification and microscopic identification of stone cells between the two, TLC identification revealed that the content of Gallic Acid in immature products was higher than that in Calyx Kaki by using Gallic acid as reference. HPLC identification also indicated the same result. CONCLUSION The morphological identification, microscopic characteristics of stone cells, combing with the determination of Gallic Acid can be the feasible methods that used to distinguish two materials.