Antioxidant drugs riboflavin production plant, including: tankl (F101), tank2 (F102), reactor (D101), transfer pump (J101), reactor (D102), tank3 (F103); the connection between the various components of the production plant is: tank 1 (F101) is connected to reactor (D101), tank2 (F102) is connected to reactor (D101), reactor (DI01) is connected to transfer pump (J101), transfer pump (J101) is connected to reactor (D102), reactor (D102) is connected to tank3 (F103); among them, nominal volume of tankl (F101) is 2.6-2.8 m3. <;Figure 1>;