Drainage device for tunnel civil engineering

The utility model provides a drainage device for tunnel civil engineering, which belongs to the technical field of drainage devices and is characterized in that when the drainage device is used, a combined civil engineering drainage assembly is inserted into a slope, then a drainage pump is opened, and accumulated water in the slope in a tunnel can be pumped out by a water pumping pipe; tunnel slope soil loss caused by water seepage in soil causes collapse and other dangers; the multiple combined civil engineering drainage assemblies are arranged, every two combined civil engineering drainage assemblies are connected through the corresponding middle connecting pipe, cuttage and water pumping treatment can be conducted on a large-area slope through the multiple combined civil engineering drainage assemblies, and the combined civil engineering drainage assemblies are conveniently connected; the use number can be selected according to the slope length; during water pumping, water in the sloping field is firstly