Anaerobic fermentation reactor

The utility model provides an anaerobic fermentation reactor which comprises a stirring assembly, and the stirring assembly comprises a U-shaped seat, a first rotating rod, a fermentation box, a gear ring, an L-shaped plate, a second rotating rod, a first motor, a gear, a third rotating rod and stirring blades; and a first rotating rod is rotationally mounted at the top of the U-shaped seat. The first motor drives the gear to rotate through the second rotating rod, the gear drives the fermentation box to rotate in the forward direction through the gear ring, the fermentation box rotates on the U-shaped base through the first rotating rod, the second motor drives the third rotating rod to rotate on the fermentation box, and the third rotating rod drives the multiple stirring blades to stir kitchen waste in the reverse direction. A third rotating rod drives a scraping plate through a fixed rod to scrape kitchen waste residues and fall into the fermentation box, so that the kitchen waste can be uniformly stirred