Soft rock tunnel supporting structure

The utility model discloses a soft rock tunnel supporting structure, which belongs to the technical field of soft rock tunnel protection and comprises two protective supporting plates for supporting, protective supporting components are arranged on the two protective supporting plates, each protective supporting component comprises two first extension plates respectively arranged at one end of the corresponding protective supporting plate, and the two first extension plates are respectively provided with a second extension plate arranged at the other end of the corresponding protective supporting plate. And second extension plates are arranged at the other ends of the two protection supporting plates correspondingly. By arranging the protection supporting assembly, a first extension plate and a second extension plate are driven to reset through the elasticity of a torsional spring, so that the device can continuously support and protect a tunnel, and the supporting area of the second extension plate and a fir