The invention relates to a device for rapidly marking a schizothorax fish specimen in a field investigation process, which comprises a vertical rod, wherein two insertion hole, which are distributed up and down, are formed in the side surface of the vertical rod; insertion rods are respectively arranged in the insertion holes; the inner periphery of the insertion rods are respectively in sliding contact with the outer periphery of corresponding insertion holes; the left ends of the insertion rods are fixedly connected with a same holding rod; the outer periphery of the insertion rods are respectively sleeved with springs; the springs are positioned between the holding rod and the vertical rod; the right ends of the insertion rods are fixedly connected through a connecting rod; and the middle part on the right side of the connecting rod is fixedly connected with the left side of a transverse plate; a vertical pipe is arranged below the transverse plate; the top side of the vertical pipeis fixedly connected with the bottom side of a coaxial annular blade; the blade of the annular blade faces upwards; a through hole is formed in the top side of the transverse plate; and the inner periphery of the through hole is in sliding contact with the outer periphery of the annular blade. According to the device, the structure is simple, the conception is ingenious, a cloth label can perforate and be directly tied on the fin, nylon rope tie or needle thread are not needed, the problem of difficult degradation is avoided, and the operation is convenient, so that the actual requirement canbe met, and the device is suitable for popularization.