The fishery hard pellet 3.0 medium feed was used to conduct the density measurement test and the uniaxial plate compression test to comprehensively study the physical parameters of fish feed discrete element simulation. The measured values of density， elastic modulus， shear modulus and Poisson's ratio of hard pellet feed were 1 096 kg/m³， 336.32 MPa， 126.65 MPa and 0.33， respectively. At the same time， the discrete element model of hard pellet feed was established with EDEM software. Combined with bench test and simulation test， the restitution coefficient， static friction coefficient and rolling friction coefficient between hard pellet feed-steel and hard pellet feed-nylon were calibrated. The values of them were 0.38， 0.538， 0.028， 0.405， 0.356， 0.033， respectively. The restitution coefficient， static friction coefficient and rolling friction coefficient between hard pellet feeds were calibrated through stacking angle test， the steepest climbing test and Box-Behnken response surface optimization test. The values of them were 0.364， 0.236， and 0.13， respectively. The self-developed baiting machine was used for the verification test of parameters. Taking the distribution variation coefficient of hard pellet feed as the evaluation index， the relative error of distribution variation coefficient between actual hard pellet feed and simulated hard pellet feed was 1.709%. It is indicated that the established discrete element model and the calibrated physical parameters of fishery hard pellet feed can be used for EDEM discrete element simulation test.