A promising direction for improving the balance of the diet of livestock and poultry by trace element composition is the enrichment with ultrafine particles of scarce trace elements. At the same time, it is important that they are evenly distributed throughout the volume of the feed mixture. The purpose of this study is to increase the uniformity of the distribution of ultrafine particles in feed mixture by developing special equipment and improving the technological process. The use of new technologies for preparing feed mixtures based on the control of process parameters makes it possible to obtain a product with specified functional parameters and preserved nutritional properties. Analysis of theoretical studies of the process of dosing and mixing ultrafine particles has shown that the best variant of their motion in the mixture flow is laminar motion. The designed processing line provides for the separate supply of premixed feed mixture and ultraparticles to the vibrating mixer. The efficiency of the mixing process in a vibrating mixer was assessed using three sections of a feed mixture with ultraparticles of iron, zinc, cobalt, and molybdenum powders. The optimal working parameters are achieved under the following conditions: the angular velocity of the vibrating mixer is 3–7 rad/s, the oscillation frequency is 9–37 Hz, the vibration mixing time is 113–333 s, and the time for opening the controlled dispenser (feeding ultrafine particles into the vibrating mixer) is 5–15 s. When using a controlled ultraparticle dispenser and a spherical impeller, the particles were distributed more evenly in the feed. The lowest effect on the value of this indicator in the three sections of the feed mixture has been recorded for zinc (up to 2.7%), followed by iron powders (up to 3.6%) and molybdenum powders (up to 9.5%). The developed equipment had the greatest effect on the uniformity of cobalt distribution (up to 20.5%). At the same time, the deviation from the norm (0.5 mg/kg) did not exceed 2%; i.e., the value of the qualitative indicator of uniformity of the distribution was 98%.