In the field of coal chemical production, the isothermal reforming furnace has gradually become the mainstream reforming furnace in recent years, with the advantages of reaction and long service life. However, the unique equipment design and structure have created difficulties in unloading and filling the isothermal reforming furnace. But the work of unloading and is an important part of the maintenance and operation of the isothermal reforming furnace, and the success of the work directly affects the good use of the catalyst in the entire reforming. The specific operation methods, problems encountered and solutions in the process of unloading and filling the isothermal reforming furnace in different enterprises were analyzed, draws experience lessons from them, and  the technical methods and measures proposed were further verified and improved. In addition, exchanges and discussions with experts and technicians in related fields will be out to obtain first-hand information and valuable suggestions from actual production, so as to ensure the practicability and operability of the research content.