Improved structure of vacuum feeding machine

The utility model discloses an improved structure of a vacuum feeding machine, which comprises a processing bin, a material storage part arranged below the processing bin, a back-blowing fan arranged above the processing bin and a vacuum pump communicated with the processing bin through a pipeline, a filter element is vertically arranged in the processing bin, a connecting groove is horizontally arranged on the outer wall of the processing bin, and the back-blowing fan is arranged in the connecting groove. A through groove is formed in the position, corresponding to the connecting groove, of the processing bin, and a beating plate is horizontally arranged at the bottom of the filter element. According to the filter element cleaning device, the striking plate capable of moving on the processing bin is arranged, the spring shakes to drive the striking plate reaching the position below the filter element to strike the filter element, reverse cleaning of the reverse blower is assisted, materials on the filter ele