The utility model relates to a remote-control adjusting device for mounting angle of a power transformer bushing. The remote-control adjusting device comprises a wireless remote-control electric hoist, U-shaped ring of a main lifting rope, a main ring and a binding loop. Two ends of the main lifting rope are connected to a lifting ring of the bushing through the U-shaped rings; the middle of the main lifting rope together with an upper end hook of the wireless remote-control electric hoist is hung on the main ring; the main ring is hung on a hanger of a single-hanger crane; the lower end of the wireless remote-control electric hoist is hung to the binding hoop which hoops an insulator of the bushing. By means of the single-hanger crane only, operations of turning, standing, mounting and demounting of the bushing can be completed. The adjusting device with remote-control operation is easy to use and safe and reliable; during mounting or demounting, the power transformer bushing can be mounted or demounted smoothly according to the original mounting angle, and can be placed from a vertical state into a horizontal state after being demounted, and accordingly convenience in placing and mounting is achieved. Meanwhile, as the mounting angle of the power transformer bushing can be adjusted in an aerially wirelessly remote control manner, the power transformer bushing can be mounted successfully by binding once.