A rotary fetching low-temperature cryopreserving tube is used for quickly fetching and storing target samples and comprises a cutting tube with an open upper end. The rotary fetching low-temperature cryopreserving tube is characterized in that an external thread is arranged on the outer wall of the open end of the cutting tube, and a plurality of cutting sawteeth in peripheral arrangement are arranged on the end face of the open end of the cutting tube; a tube cap is mounted at the open end of the cutting tube in a threaded manner, a lower end of the tube cap is open, a sleeve is arranged on the inner side of the tube cap, the upper end of the sleeve is fixed at the top of the inner cavity of the tube cap, and a sealing ring sleeves the lower end of the sleeve and well contacts with the inner wall of the cutting tube after the tube cap is disposed on the cutting tube; a closed end of the cutting tube is detachably connected with a connecting member, and a mounting hole matched with an output shaft of an electric screwdriver is formed in the connecting member. The rotary fetching low-temperature cryopreserving tube can conveniently realize sampling and can store samples in the first place.