Foundation pit support structure with tunnels on side walls of foundation pits

The invention discloses a foundation pit support structure with tunnels on side walls of foundation pits. The structure comprises a base plate; a first support plate is hinged to one side of the upperend of the base plate; fixed blocks are fixed on one sides of the first support plate and the base plate; second limiting grooves are formed in one sides of the two fixed blocks; first limiting blocks are inserted in the second limiting grooves; first support blocks are fixed on one sides of the two first limiting blocks; one sides of the two first support blocks are rotationally connected with two second support rods; two second support rods on the same side form one set; and the opposite ends of the two second support rods in the same set are rotationally connected with second support blocks. The structure is suitable for temporary supporting of foundation pits with various angles, is stable and short in construction period, cannot damage the side walls of the foundation pits with the tunnels, stably supports t