1. Preparation: Clear obstacles around and ensure the safety of the work area. Prepare tools (wrenches, screwdrivers, hydraulic trucks, ropes, etc.). 2. Unload the load: Remove hanging loads such as hooks and chains to ensure that the gantry crane is completely unloaded. 3. Remove electrical/power components (if any): Disconnect the power supply and dismantle electric hoists, cables, etc. 4. Disassemble the main beam and legs: Use support frames or auxiliary equipment to secure the crossbeam to prevent sudden falls. Dismantle in reverse order of installation (usually start with the crossbeam and then the legs). 5. Handle the foundation: If it is fixed by anchor bolts, loosen the bolts; if it is counterweighted, remove the weight blocks.