Abstract: The calculation of particle fluid hydrodynamics (CPFD) method is based on Barracuda simulation platform.The finite element model for internal flow field of multi-density mineral particle dry beneficiation device was established, and the correctness of finite element model established was verified by experiments.The effect of selective separation behavior of multi-density mineral particles on the separation and enrichment of mineral particles was studied.The results showed that the multi-density mineral particle dry beneficiation device can effectively sort and enrich high-density valuable metal mineral which are particles tungsten, manganese and copper.The grade of tungsten as a multi-density mineral particle component increases with the increase in the particle size of the mineral particles.When the wind speed is 4.2 m/s, the mineral grain tungsten is better in sorting at a distribution distance of 170 mm, and grades up to 10.655% at an opening of 4 mm; the mineral grain manganese has the best enrichment effective at a distribution distance of 270 mm, and the grade reaches a maximum of 48.3% when the opening is 3 mm.