Tunnel blasting protection device

The invention relates to the technical field of tunnel blasting protection, in particular to a tunnel blasting protection device which comprises an arc-shaped baffle, a fixing base is fixedly connected to the outer surface of the lower end of the arc-shaped baffle, a supporting stand column is fixedly connected to the outer surface of the lower end of the fixing base, and a stand column base is slidably connected to the outer surface of the lower end of the supporting stand column. When the device is used, the position of the limiting cone can be adjusted through the arranged limiting screw rod, the two sides of a tunnel can be supported in cooperation with the fixing cone, the inner wall of the tunnel can be firmly supported, and the situation that the interior of the tunnel collapses due to blasting is avoided; a first inclined rod can slide on the outer wall of a fixed round rod, when an adjusting screw rod rotates under the action of a first motor, the height of an arc-shaped baffle is adjusted in coopera