In light of the efficacy of bidirectional rotary dry gas seals in augmenting dynamic pressure and enhancing wear reduction and leakage control, a novel double L-groove dry gas seal face structure is proposed in this study. The gas film flow field under varying operating conditions was simulated and analyzed utilizing Fluent software, with key performance indicators being calculated and scrutinized. The findings indicate that the double L-groove dry gas seal exhibits a pronounced dynamic pressure effect, which contributes to augmenting the opening force of the seal end face. Notably, the opening force decreases with increasing film thickness, but increases with elevated pressure and rotational speed. Furthermore, the opening force initially rises before subsequently diminishing with increasing groove depth. Conversely, the leakage rate increases with greater film thickness, groove depth, and pressure, but decreases with heightened rotational speed. In summary, the order of groove configurations for optimizing sealing performance is as follows: double L rectangular groove > double L trapezoidal groove > double L trapezoidal groove with upper bevel > double L trapezoidal groove with lower bevel. This research elucidates the sealing performance of distinct double L-shaped dynamic pressure slots under diverse working conditions and furnishes a theoretical basis for engineering applications.