We analyzed the seroprevalence of tick-borne severe fever with thrombocytopenia syndrome virus (SFTSV) in farm-raised minks using double antigen ELISA (enzyme-linked immunosorbent assay) kit and indicated that 8.4% (15/178) of the minks had antibodies to the nucleoprotein of SFTSV and 72.7% (8/11) of mink farms had minks positive to SFTSV. The ELISA results were further confirmed by presence of neutralization to SFTSV in the mink sera. Our results suggested that minks were widely infected with SFTSV in China.