In order to simulate the operating condition of dense medium cyclone and reasonably evaluate the wear resistance of lining materials, a swirl slurry erosion tester was designed by modifying the slurry stir system and the specimen installation mode of traditional slurry erosion tester. In the swirl slurry erosion tester, the uniform slurry flow was obtained by using stirrer composed of stainless and nylon two level blades, and the operating environment of dense medium cyclone lining materials could be simulated by fixing the specimens on the inner surface of the barrel. The impact angle ranges of the swirl slurry erosion tester is from 0° to 90°,the slurry impact velocity can reach 2.4 m/s by hydromechanics calculating.The results of slurry erosion experiments for aluminum show that the data repeatability error of the swirl slurry erosion tester is less than 16%,and the data stability error is less than 17%.