The invention discloses a high-temperature solid particle erosion test device, and relates to the technical field of material erosion wear and protection. The high-temperature solid particle erosion test device mainly comprises a plurality parts such as an air compressor, an air pressure gauge, a flow regulating valve, a solid desiccant, a buffer tank, a heating coil pipe, a high-temperature gas storage tank, a temperature controller, a thermodetector, a mass flow meter, a sand storage tank, a magnetic stirrer, a sand mixer, an accelerating tube nozzle, an upper sealing test cavity, a strong adsorption sticky plate, an adsorption banister brush, a limiting clamping groove, a workbench frame, a lower sealing test cavity, a rotary separator, a particle collection box, a dust collection purifier, a sample clamping tester, a double-disc tachymeter and the like. Solid particles are uniformly stirred, heated and heated by a high-temperature gas, and the heat efficiency is high; secondary interference of the solid particles is avoided through speed measuring of the double-disc speedometer, and the double-disc speedometer is simple in equipment and convenient to operate; and a magnetic stirring device ensures the continuity of sand discharge of a nozzle on the premise of ensuring sealing.