Abstract: After the application of pneumatic supercharging device in light monomer column temporary support, light monomer pillar can quickly reach setting load during the tunneling construction,which can prevent false roof or immediate roof fall into the work area and damage workers when active support is carried out in the empty top area of roof. Under the condition of rugged roof and small pressure water, pneumatic supercharging device can increase the water pressure of hydraulic pressure and make steel strip close to the roof,which can give full play to the combined support effect of anchor mesh belt.