Tunnel construction supporting device capable of being rapidly unfolded

The tunnel construction supporting device capable of being rapidly unfolded comprises a bottom plate, the top end of the bottom plate is fixedly connected with an adjusting groove, the two sides of the interior of the adjusting groove are respectively provided with a movable block, and one side of the top end of each movable block is movably hinged to a movable vertical plate. According to the tunnel construction supporting device capable of being rapidly unfolded, the moving blocks are arranged on the two sides of the interior of the adjusting groove correspondingly, when the tunnel construction supporting device is used, the distance between the bottoms of the movable vertical plates can be adjusted by adjusting the positions of the moving blocks in the adjusting groove, and therefore the supporting inclination angle is adjusted; the stable insertion rod moves in the reserved groove while adjustment is conducted, so that the movable block is stabilized, and after adjustment is completed, the locking sleeve