Abstract: TCP（teosinte branched1/cycloidea/proliferating cell factor） is a kind of transcription factors peculiar to plants, which participates in the plant cell signal transmission and plays an important regulatory role in the process of plant growth and development. Potato（Solanum tuberosum） is one of the four major food crops in the world.In order to explore the role of TCP transcription factors in potato growth and development, this study carried out a whole-genome retrieval of potato TCP transcription factors by means of bioinformatics, and analyzed the expression patterns of these TCP transcription factors by means of the expression database. 27 StTCPs geneswith657～1 347 bp in length and encoding 201～534 amino acids were retrieved from the potato genome databa se. All potato TCP proteins are hydrophile proteins with molecular weights ranging from 21 143.87～59 686.47 Da and isoelectric points ranging from 5.22～10.08. Except one TCP was located in nucleus and chloroplast, the other 26 TCP were located in nucleus. The results of conservative motif analysis showed that the conservative motif composition of the members of the potato TCP family is different, but all of them have bHLH conservative domain.The homology analysis results showed t hat potato TCP had higher homology with Arabidopsis thaliana and tobacco TCP, but lower homology with rice TCP. Tissue expression pattern analysis showed that the expression of potato TCP gene was tissue specific. Among them, StTCP16 and StTCP19 genes were highly expressed in potato stems and young tubers. The expression pattern analysis of response induction showed that the expression of StTCP13, StTCP22 and StTCP24 genes was strongly induced by IAA and other hormones. Under salt and mannitol stress, the expression of StTCP13 gene was significantly decreased. The results of this study provided the basis for the biological functions research of TCP transcription factor in potato.