Abstract: To address the challenge of integrating lamina structure regulation equipment into existing threshing and redrying lines due to its large footprint, an inclined ascending screening process was designed. This process consists of primary and secondary screening stages and can be installed above the lamina receiving conveyor. Corresponding improvements were made to the lamina structure regulation equipment based on this process, enabling lamina size adjustment without occupying additional floor space. In this design, the roller screening device is installed above the receiving conveyor at a 30° angle. The roller shaft spacing is 80 mm for the primary stage and 40 mm for the secondary stage. The primary stage screens out smaller lamina, which fall onto the receiving conveyor, while larger lamina are conveyed to the secondary stage. The secondary stage further screens out smaller lamina onto the conveyor, with the remaining larger lamina directed to a cutting device for size regulation. Furthermore, the original eight cylindrical screening teeth on the roller shafts were replaced with screening plates featuring eight trapezoidal, flake-shaped teeth. This modification solved the problem of cylindrical teeth penetrating the lamina, which hindered effective flipping and resulted in low screening efficiency. In practical production applications, operating at a motor frequency of 40 Hz and while maintaining stable threshing economic indicators, the regulated large-lamina rate was controlled between 35% and 45%, and the medium-plus-large lamina rate was maintained above 76%. The equipment demonstrated good stability. Compared to the regulation method involving the replacement with hexagonal frames, this approach achieved lower energy consumption, along with improved lamina structure and uniformity, effectively meeting the raw material processing requirements of the cigarette industry.