The invention relates to a remains low-temperature anti-corrosion device and a use method thereof. The anti-corrosion device is composed of a portable refrigerating machine and a cold blanket. Remains are covered with the cold blanket, two flow channel pipe openings of the cold blanket are inserted in a water inlet connector and a water outlet connector of a water tank, the portable refrigerating machine is started for refrigeration, the temperature of a refrigerating medium in the water tank is kept to be 0-5 DEG C through automatic control of a PLC integrated machine, and the temperature of the remains is constantly 8 DEG C; the portable refrigerating machine continues running and does not stop till cremation or burying is needed, the portable refrigerating machine is closed, the two flow channel pipe openings of the cold blanket are cut off, and the cold blanket and the remains are cremated or buried together. Compared with a traditional cold coffin, the remains low-temperature anti-corrosion device is economical and portable, the cold blanket can be buried with the remains together, and the device also has the advantage of being environmentally friendly.