The invention discloses a heat insulation butterfly valve. The heat insulation butterfly valve comprises a valve body, a valve rod rack and a valve rod, wherein the valve rod rack is fixedly installed on the valve body, and the valve rod is arranged in the valve rod rack. The heat insulation butterfly valve is characterized in that a sealing ring a and a sealing ring b are arranged outside an inlet and an outlet of the valve body respectively, a sealing ring is arranged outside the top of the valve rod rack, a heat insulation shell is arranged outside the valve body, ceramic rings are connected between the sealing ring a and the heat insulation shell and between the sealing ring b and the heat insulation shell, and the space between the heat insulation shell and the valve body is vacuumized. The heat insulation butterfly valve is good in heat insulation effect and is provided with a vacuum heat insulation structure, a temperature alarm and a temperature monitoring system. According to the heat insulation butterfly valve, through vacuum heat insulation, the heat insulation effect is very good; by arranging a temperature sensor in a heat insulation cavity, the temperature can be accurately measured without contact between a conveying medium and the temperature sensor.