Abstract: Hydrogen energy is a clean and green energy source, known as the "ultimate energy" of humanity.The key to hydrogen energy lies in hydrogen storage. Among many hydrogen storage methods, magnesium based solid-state hydrogen storage has advantages such as high hydrogen storage density, good reversibility, high safety, and good environment. It is one of the most promising hydrogen storage materials for large-scale promotion and application. Due to its strict preparation process, high safety risks, and difficulty in equipment development, it is currently in the laboratory development stage.Based on the high technical requirements for the development of macro scale preparation of magnesium based solid hydrogen storage materials and strict safety risk control, the reaction principle of magnesium based solid hydrogen storage materials is analyzed. Detailed design and demonstration of equipment component structure and materials are carried out to effectively control the hydrogen embrittlement and corrosion effects of hydrogen on equipment structural components under high temperature and pressure. Develop non-standard specialized safety devices, set up inert gas protection functions and redundant safety interlock control measures, effectively control safety risks such as high reaction heat release, hydrogen leakage, and magnesium based powder ignition. Through the above measures, the safety and reliability of the equipment were ensured, and the reaction requirements for macro preparation of magnesium based solid hydrogen storage materials were met. Finally, the first key equipment for macro preparation of magnesium based solid hydrogen storage materials was developed, and satisfactory magnesium based solid hydrogen storage materials were prepared.