The invention provides a hydrogen generation device, and belongs to the field of electrolysis equipment. The hydrogen generation device comprises a water electrolyzer, a water storage bottle detachably connected with a top opening of the water electrolyzer through a bottom end opening, an air storage bag communicating with a top end opening of the water storage bottle through an air pipe, a valvecommunicating with the air storage bag through an air pipe, and an air nozzle communicating with the valve. The hydrogen generation device not only can inject hydrogen in water to prepare hydrogen-enriched water, but also can inject the hydrogen into other solution (such as soybean milk and milk) to prepare hydrogen-enriched solution, so that the application range of the hydrogen generation deviceis widened, the demands of users on different hydrogen-enriched solution can be met, and the flavor of the hydrogen-enriched solution is improved.