A multifunctional device for installing and detaching a drop-out fuse comprises an insulation pull-rod (8), and is characterized by being provided with a fuse tube supporting frame, an angle adjusting disc and a butt joint clip, wherein the fuse tube supporting frame is provided with a base (1) and at least two elastic steel sheets (3), an adjusting sheet A (6) on the angle adjusting disc is connected with the base (1) of the fuse tube supporting frame, and a clamping sleeve (7) on the butt joint clip is connected with the adjusting sheet A (6). The multifunctional device for installing and detaching the drop-out fuse has the advantages of being simple in structure, being flexible to operate, being convenient and safe to use, improving the work efficiency of installing and detaching a fuse tube, and lowering the falling probability of the fuse tube.