Plugging device, drilling assembly and construction device for stratum anchor rod construction

The utility model provides a plugging device, a drilling assembly and a construction device for stratum anchor rod construction, and the plugging device comprises a pressing plate, a sealing washer and a connecting piece. The pressing plate is provided with a first sleeve through hole; the sealing gasket is provided with a second casing pipe penetrating hole corresponding to the first casing pipe penetrating hole, the end face, away from the pressing plate, of the sealing gasket forms a plugging face covering an orifice of an embedded steel pipe on the underground diaphragm wall of the foundation pit, and the inner ring of the sealing gasket protrudes inwards out of the hole wall of the first casing pipe penetrating hole to form a casing pipe sealing face in the embedded steel pipe; the connecting piece is arranged on the pressing plate and the sealing washer in a penetrating mode. By means of the technical scheme, the problem that in the prior art, when an anchor rod is constructed in a sandy gravel stratum