α-heating has attracted considerable attention in fusion research because it plays a key role in achieving self-sustained burning of plasmas. In inertial confinement fusion (ICF), deuterium-tritium (DT) fuel may mix with impurity particles, thus affecting reaction efficiency. This study investigates the effect of beryllium (Be) mixing with DT fuel on α-heating by calculating the electron-ion energy partition fraction and the range of α particles. Mixture densities of 4.15\ \mathrmg/cm^3 and 415.0\ \mathrmg/cm^3 are considered, with ion and electron temperatures ranging from 0.1 keV to 100.0 keV. All plasma components are in thermodynamic equilibrium and share the same temperature. Both DT and Be ions are assumed to be fully ionized. The partial densities of different species in the mixture are obtained using the average atom model. The results show that mixing with Be ions reduces the energy partition fraction of DT ions. When the mixing degree reaches 0.05, the reduction exceeds 10%. Mixing also leads to a gradual decrease in the electron energy partition fraction at high temperatures. Moreover, Be ions are heated more easily than DT ions. In addition, Be mixing shortens the range of α particles in most cases. Compared with the mixing of gold (Au) ions, Be mixing has a smaller impact on the energy partition fraction of DT ions and the range of α particles. These differences may originate from the distinct charge states, masses, electron screening in the average atom model, and bound-electron effects of the two impurity species. The data calculated in this study provide important references for future ICF ignition target design. The datasets presented in this paper are openly available at https://www.doi.org/10.57760/sciencedb.j00213.00282.