Aerial disassembly and assembly tool and method based on gearbox

The invention discloses an aerial disassembly and assembly tool and method based on a gearbox, and relates to the technical field of wind power gearbox maintenance equipment.The aerial disassembly and assembly tool comprises an auxiliary hanging beam, an upper pressing beam is arranged at one end of the auxiliary hanging beam and arranged above a main shaft, and one end of the main shaft is rotatably connected with a bearing rear check ring; the two ends of the push rod assembly abut against the bearing rear check ring and the gearbox respectively. First chain blocks are arranged on two sides of the main shaft; double-thread screws are arranged at the two ends of the upper pressing beam, the bottom ends of the double-thread screws are connected with counter-force beams, and the counter-force beams are connected with the bottom of the main machine frame. According to the aerial disassembly and assembly tool based on the gear box and the disassembly and assembly method, the technical problems that in the prior