The present invention discloses a soft-shelled turtle cleaning device in the field of aquaculture devices. The soft-shelled turtle cleaning device includes a cleaning box, an electrical motor and a blade. The cleaning box includes an outer box body, an inner cylinder body and an end cover. A sewage discharge pipe is arranged at the bottom of the outer box body and a material outlet is arranged at the middle part. The inner cylinder body is fixed at the upper end of the interior of the outer box body, a vertical notch is arranged on the side wall of the inner cylinder body, a slideway is arranged under the notch and a plurality of sewage discharge holes are arranged at the bottom end of the inner cylinder body. The end cover is fixed at the upper end of the outer box body, a water inlet pipe is connected to the end cover, the electrical motor is arranged at the upper end of the end cover, and the output end of the electrical motor extends into the internal cylinder body and is connected with a brush. The blade passes through the end cover, the lower end of the blade is located at the outside of the notch, and a pressing plate is arranged at the upper end of the blade. According to the technical scheme, before the soft-shelled turtles are cleaned, the soft-shelled turtle heads are firstly removed and the operators is prevented from being bitten by the soft-shelled turtles during the cleaning process. The motor drives a brush plate and bristles to clean the soft-shelled turtles, so that the soft-shelled turtle cleaning device is high in cleaning frequency and cleaner in cleaning, needs no artificial hand washing, reduces the labor intensity and enables the soft-shelled turtle cleaning to be more convenient.