The heat preservation ball valve has good heat preservation and cold preservation characteristics, and the diameter of the valve is consistent with the pipe diameter, and at the same time, the heat loss of the medium in the pipeline can be effectively reduced. It has good insulation and cold preservation characteristics, and at the same time can effectively reduce the heat loss of the medium in the pipeline. Insulation valves are widely used in various systems such as petroleum, chemical, metallurgy, and pharmaceuticals, effectively reducing the loss of heat in the pipeline and preventing the appearance of crystals and solidification of the medium. The function of the heat preservation ball valve is that when the valve passes through the valve at a high or low temperature, the material in the heat preservation valve has a heat insulation effect on the medium, so that the medium does not condense or stick to the inside of the valve body, so that the opening and closing of the valve can operate normally.