To enhance the collision safety of light trucks in compliance with the GB26512-2021 regulation, this study introduces simulation methods for the double A-pillar impact test applicable to light trucks weighing over 7500 kg, classified under categories N2 and N3. The proposed strategy involves the integration of a support frame within the door to mitigate deformation at the front corner of the door aperture. Additionally, reinforcement of the door aperture and the B-pillar is suggested to further minimize deformation. In scenarios where design constraints may lead to significant deformation during collisions, this research advocates for the application of advanced energy distribution methods. These methods facilitate the absorption of some impact energy, thereby reducing cab deformation and ensuring the maintenance of adequate living space for occupants as per regulatory standards. This paper introduces an innovative cab structure that incorporates a novel path for collision force transmission and energy distribution techniques. The effectiveness and accuracy of the finite element model are corroborated through a comparison of collision outcomes between simulated and actual vehicles in double A-pillar collision tests.