<p>In order to reduce the penetration resistance of equipment into the strong fragrance liquor cellar, accelerate the expansion of intelligent, information-based products applied to the field of strong fragrance liquor fermentation, improve brewing quality, and solve the current situation of lack of competitiveness of medium and high-end liquor products. Based on the discrete unit method (DEM), through preliminary experiments and simulation, the material parameters and contact parameters of sorghum in fermented grains were established. On this basis, a contact model of fermented grains pit was established based on Hertz-Mindlin with JKR (Johnson-Kendall-Roberts) Cohesion model, and the penetration characteristics of the cone bar inserted into the contact model of fermented grains pit were analyzed. The results showed that the material parameters and contact parameters of sorghum measured by the previous experiment and simulation were accurate, and the accuracy of the parameters was verified by the repose Angle experiment. The influence of conical rod structure (diameter, shape and Angle) on penetration resistance is as follows: the maximum difference of penetration resistance caused by diameter is about 450N, that caused by double cone is 10.3%, and that caused by cone Angle is about 4.3–9.6%. The influence of operation mode (depth and velocity) on the penetration resistance is: the depth is greater than the velocity, and the penetration resistance presents a trend of “slow before and slow after”. When the penetration depth is large, the difference of the penetration resistance caused by different penetration velocity is not significant. This study not only enriched the relative material parameters of grain and sorghum discrete elements, but also provided a basis for reducing penetration resistance and further optimizing the structure of monitoring equipment and the design of operation mode.</p>