Reaction shield structure with high stabilizing effect for tunneling works

The invention relates to a reaction shield structure with a high stabilizing effect for tunneling works. The reaction shield structure comprises a shield protective frame and an expanding plate; a buffer layer is arranged on the inner wall in the shield protective frame, a rotating shaft is connected to the upper end of the outer wall of the top of the buffer layer, a first protective plate is arranged on the outer wall of the rotating shaft, and fixing clamps are connected to the top of the outer wall of the first protective plate. The reaction shield structure has the advantages that a movable block can move left and right under interaction of a slide way and a second hydraulic cylinder, and friction resistance can be reduced during moving through the arrangement of the slide way, so that both time and labor are saved; besides, the expanding plate can be moved from the inside of a support under action of the second hydraulic cylinder to support walls of tunnels when the reaction shield structure is used for