The invention discloses an adjustable installation support for a drop-out fuse, and solves a problem that the angle of the drop-out fuse is difficult. The lower part of a support (15) shaped like a bowl pipe is a cam-shaped box body (4), and the cam-shaped box body (4) is movably disposed on a bottom plate (2). The top of the support (15) shaped like a bowl pipe is fixedly connected with a connecting plate (16) of a drop-out fuse clamping hoop (17). The bottom plate (2) is fixedly provided with two fixed supports (3), and a connecting hinge pin (6) between the two fixed supports (3) is movably connected to the center of the cam-shaped box body (4) in a passing-through manner. The center of the connecting hinge pin (6) is fixedly provided with a gear (5), and the central part of a lifting lever (7) is hinged to a hinge pin (8). A lifting hook at the top of the lifting lever (7) abuts against teeth of the gear (5). The support is firm in installation, and can achieve the convenient and flexible adjustment of the angle of the drop-out fuse.