The invention discloses a device for freezing an ice sleeve in a water triple point bottle. The device comprises a water tank, a suspension frame and a temperature control device, wherein the water tank is used for containing the water triple point bottle, the suspension frame is installed inside the water tank and used for installation of the water triple point bottle, and the temperature control device is connected with the water tank, is used for supplying constant-temperature circulating cooling water to the water tank, enables the ice sleeve to be formed inside the water triple point bottle, and achieves solid, liquid and gas three-phase equilibrium coexistence of water. According to the device, the freezing method is simple to operate, freezing processes are convenient, safe and reliable, operation personnel do not need to purchase liquid nitrogen or other low-temperature liquid, an ice machine, an ice crusher and a heat preservation barrel are not required to be manufactured, simultaneously, the operation personnel do not need to be trained professionally and have experienced operating skills, and the risk that the water triple point bottle can be damaged during the freezing processes does not need to be worried. The device can be suitable for triple point long-term reproduction preservation of temperature standard laboratory water, and is conducive to popularization of temperature fixed point quantity transmission.