Device and method for measuring reactivity of unburned coal powder of blast furnace

The invention provides a device and a method for measuring the reactivity of unburned coal powder of a blast furnace. The device comprises a part for supplying a gas source, a drying system, a flowmeter, a high-temperature heating furnace and an infrared gas analyzer, wherein the part, the drying system, the flowmeter, the high-temperature heating furnace and the infrared gas analyzer are sequentially connected with one another through connection pipes. By the device and the method for measuring the reactivity of the unburned coal powder of the blast furnace, the gasifying reaction temperature can be adjusted; the reactivity of the unburned coal powder under conditions of different atmospheres and different spraying coal ratios can be measured; and the device and the method can be used for guiding the selection of spraying coals of the blast furnace.