The invention discloses a tunnel construction plate overturning device which comprises a plate cushion block, a plate, an overturning control base, a fixed bottom plate, a support rod, a universal wheel, a tool case, a drawer and a drawer handle, wherein the fixed bottom plate takes the structure of a rectangle, a rectangular groove is formed in the upper end of the fixed bottom plate, and the overturning control base is movably mounted in the rectangular groove; the plate cushion block is arranged at the upper end of the overturning control base; and the plate cushion block and the overturning control base are integrally formed. The tunnel construction plate overturning device has the following beneficial effects: the overturning control base is meshed with a first transmission gear and asecond transmission gear through a sawtooth surface, an overturning wheel disc is provided with the sawtooth surface, and a transmission base is provided with the first transmission gear and the second transmission gear, a control handle drives a main transmission gear to control the overturning angle of the overturning wheel disc, so that the overturning wheel disc controls angle overturning ofan overturning rack and the plate, the overturning angle is greatly increased, the mounting efficiency is improved, and the operation is more convenient and faster.