The utility model discloses an automatic emptying system for a perfuming and feeding filter tank, which belongs to the cigarette device technical field. The filtering tank of the automatic emptying system for the perfuming and feeding filter tank is arranged between a discharging valve of a hoisting bucket and a treble pump, a filtering screen is arranged in the filtering tank, the feeding inlet at the top end of the filtering tank is connected with the discharging valve, a discharging hole is arranged at the lower end of the filtering tank, an exhausting outlet is added and arranged on the filtering tank, and the other end of the liquid feeding bypass communicated with the exhausting outlet is communicated with the pipeline between the discharging hole and the returning valve. A pneumatic three-way spherical valve and a pneumatic two-way spherical valve are arranged between the discharging hole and the treble pump. The pneumatic two-way spherical valve is arranged on the liquid feeding bypass. The automatic emptying system has the advantage that the design is rational, the structure is simple, the operation is convenient, the air in the filtering tank can be automatically discharged, thus the pre-filling is sufficient, the two-phase fluid is ensured unformed in the liquid feeding pipeline, the liquid feeding quantity is ensured to be stabilized, and thus, the production quality is caused to be enhanced.