This disclosure relates to a circulating tumour 
cell typing and identification kit, comprising a capture probe, an amplification probe, and a labeled probe for each 
marker gene mRNA, wherein the 
marker gene mRNA comprises the following two types: at least two epithelial 
cell marker gene mRNAs selected from the group consisting of EPCAM, E-
cadherin, CEA, KRT5, KRT7, KRT17, and KRT20 mRNAs; and, at least two mesenchymal 
cell marker 
gene mRNAs selected from the group consisting of 
VIMENTIN, N-
cadherin, TWIST1, AKT2, ZEB2, ZEB1, FOXC1, FOXC2, SNAI1 and SNAI2 mRNAs. This disclosure prevents false-positive results caused by, for example, possible presence of a number of non-neoplastic epithelial cells in 
peripheral blood, introduction of normal epithelial cells during 
blood sampling, and the like. Accordingly, it may be assured that cells detected with epithelial 
cell marker genes and / or mesenchymal 
cell marker genes are indeed circulating tumour cells, further improving accuracy and reliability of the detection results.