Outer protective tube reinforcing device

The utility model discloses an outer protection pipe reinforcing device which comprises a working steel pipe and a telescopic outer protection assembly, the working steel pipe is sleeved with the telescopic outer protection assembly, the outer side of the telescopic outer protection assembly is symmetrically sleeved with butt joint supporting assemblies, and the inner side wall of each butt joint fixing assembly is provided with a clamping fixing assembly. Protection supporting assemblies are symmetrically arranged on the side faces of the butt joint supporting assembly, and buffering assemblies are arranged in the protection supporting assemblies. The buffering assembly and the protection supporting assembly are arranged, so that a buffering space is reserved with an external supporting structure or a soil layer, the outer portion of the outer protection pipe is prevented from being damaged, the butt joint supporting assembly, the clamping fixing assembly and the butt joint fixing assembly are arranged to fi