The invention relates to a construction method of a cell line of a fin of spinibarbus hollandi. The construction method comprises the following steps of 1), acquisition of the fin of the spinibarbus hollandi: jointly sterilizing a fish body by adopting methylene blue and ethyl alcohol; 2), primary culture: carrying out the culture by adopting a DMEM (Dulbecco's Modified Eagle Media) / F12 or L-15 culture solution containing a cell growth factor, fetal bovine serum, penicillin, streptomycin, gentamicin and amphotericin B; 3), subculture: when handing to an eighth generation, changing a cell culture solution to a basal culture solution, so that the cell line of the fin of the spinibarbus hollandi is established successfully. The cell line of the fin of the spinibarbus hollandi, which is obtained through the construction method provided by the invention, can be used for realizing continuous passage, is directly applied to biological characteristic research, can be used for meeting the demands of the germplasm-resource storage and the theoretical research of an economic species of the spinibarbus hollandi, can also be repeatedly freeze-thawed, and can be applied to the important research of cell biology, virology, toxicology, molecular biology, genetics, immunology and the like.