Hydrogenation reaction is widely used in the preparation of various pharmaceutical intermediates. However, due to the explosive characteristics of hydrogen, safety accidents frequently occur. Traditional batch processes, due to poor gas-liquid mixing, lead to long reaction times, and the operation process is to ensure its safety, it is necessary to replace the air in the reactor with nitrogen, the workload is large, and the operation is cumbersome; the operation of the micro-reactor is simple, and the time for cleaning the equipment is reduced. The unique umbrella structure improves the mixing effect of gas, liquid and solid, greatly reducing the reaction time, improving the conversion rate and production safety.