The invention relates to a process unit for stearic acid production waste gas treatment, which is used for treating stearic acid production waste gas. The process unit comprises a shell and adsorption layers installed in the shell, wherein the adsorption layers are parallel with the production waste gas discharge direction; the adsorption layers divide the inner cavity of the shell into a plurality of flow channels; and the production waste gas flows in parallel with the surface of the adsorption layers or crossly penetrates through the adsorption layer to perform mass transfer. Under the condition of the same unit size, the process unit provided by the invention effectively increases the flow cross section of gas, and enhances the treatment efficiency of the stearic acid production waste gas. The adsorbent layer can be easily replaced and maintained, thereby prolonging the service life of the equipment and saving the use cost.