The LG312M intelligent integrated arch frame trolley integrates multiple processes such as measuring and placing points, under-excavation operations, arch frame installation, welding mesh and connecting ribs. The installation of arch frames during one-time excavation of the double-track tunnel can be completed without moving the machine. The entire vehicle adopts an engineering chassis, diesel-electric dual power systems, and a two-way driving platform structure. The machine features favorable driving performance and can adapt to various complex tunnel road conditions. The arm frame utilizes wireless remote control and manual control operation, which is simple to accurately control the movement of the robotic arm and has the characteristics of fast, efficient, energy-saving, and safety.