The invention discloses a minced fillet dewatering device which comprises a driving device, a dewatering device and a discharging device, wherein the driving device comprises a motor and a speed changing box, a material inlet is formed in the head part of the dewatering device, the tail part of the dewatering device is connected with the discharging device, a power source is provided by the driving device, the dewatering device comprises a filter drum and a protective cover, the filter drum comprises a drum body and a spiral shaft, the spiral shaft is positioned at the center of the drum body,one end of the spiral shaft is connected with the driving device, the other end of the driving device extends out of the filter drum and extends into the discharging device, the spiral shaft is provided with spiral blades in the dewatering device, the spiral compression ratio of the spiral blades is gradually reduced from the feeding hole end to the discharging device, the drum body consists of graded screens; the protective cover wraps the drum body, is same as the drum body in length, and comprises an upper cover and a lower cover; a filtrate recycling groove is formed in the lower cover and is provided with a groove opening which is connected with a centrifugal device, the discharging device comprises a squeezing plate and a discharging groove, the squeezing plate is tightly attached to the tail end of the filter drum, the spiral shaft penetrates through the center of the squeezing plate, and a circular hole is formed in the squeezing plate.