Material conveying mechanism capable of conducting pretreatment

The material conveying mechanism comprises a material tank, a vacuum feeding machine and a dust collector, a feeding pipe is communicated between the feeding end of the vacuum feeding machine and the material tank, a discharging pipe extending to a set position is connected to the discharging end of the vacuum feeding machine in an inserted mode, a dust inlet pipe is connected to the dust inlet end of the dust collector in an inserted mode, and a dust outlet pipe is connected to the dust inlet end of the dust collector in an inserted mode. And the dust inlet pipe is communicated with the interior of the discharging pipe. A first hollow shell is fixedly arranged outside the circumference of the material tank in a sleeving manner, a plurality of inclined plane guide rings are arranged between the material tank and the first hollow shell, a plurality of air inlet holes are formed in the bottom of the circumferential side wall of the material tank, a connecting shell is connected to one side of the first hollow s