An amplifying method of pancreatic cells is provided. The amplifying method includes performing
digestion, resuspension, discontinuous
density gradient centrifugation treatment and amplifying treatment sequentially. The mammalian
pancreatic duct is used as the source of pancreatic precursor-like cells in the amplifying method, and
islet cells and acinar cells in the
cell clusters obtained by the discontinuous
density gradient centrifugation treatment are removed. It is beneficial to improve the yield of the pancreatic precursor-like cells availably, and avoid the ethical restrictions and possible carcinogenic risks caused by using the embryonic stem cells. The amplifying medium used comprises a
reprogramming substance composed of several
small molecule compounds. It can avoid the risks of non-specific and off-target deletion that are easily caused by the use of the
gene-editing methods to change the
gene sequence. Also provided is a differentiation method and an application of the pancreatic precursor-like cells obtained by the amplifying method.