Supplementing device of fermentation test tank

The utility model discloses a supplementing device of a fermentation test tank. The supplementing device comprises a base, a collecting tube, a transition tube and a flange, wherein 2-10 pores are formed in the middle of the base; steel tubes are arranged inside the pores; the upper and lower ends of the steel tubes extend outside the pores; the collecting tube is fixed below the base; the upper part of the collecting tube takes the shape of a funnel; the lower ends of the steel tubes are arranged inside the collecting tube; outer threads are formed in the outer side of the upper part of the collecting tube; the transition tube is fixed on the flange; inner threads are formed in the inner side of the transition tube. Through the adoption of the supplementing device of the fermentation test tank, 2-10 materials can be simultaneously supplemented from one supplementing hole of the fermentation test tank, the supplementation can be implemented rapidly, the efficiency is improved, the quality is ensured, and moreover the supplementing device is convenient to assemble and disassemble, high in interchangeability and relatively high in operability for fermentation tests with relatively complex processes.