Concrete spraying construction device and method

The invention relates to a concrete spraying construction device and method. The concrete spraying construction device comprises a bracket, one side of the bracket close to a rock surface is provided with a positioning rod, a guide rod is movably connected with the positioning rod in a crossing way through a hinge seat, a spray tube for spraying concrete is connected with the guide rod in parallel along the axial direction, and the guide rod is provided with a guide rope. By adopting the structure and the method, the safety of devices and workers in concrete spraying support construction of an excavation surface in a high-risk environment can be ensured, a very important supplement is provided for the traditional manual spraying protection and mechanical spraying protection, the defect that the safety of workers and devices cannot be ensured during construction can be overcome, and safety risks in concrete spraying construction can be completely avoided. The device and the method are particularly suitable for side top arch spraying protection in cave excavation and initial closed spraying protection in case of local collapse, and the void of the concrete spraying construction method in the corresponding parts can be filled.