Multi-stage linkage type fermentation system

The utility model discloses a multi-stage linkage type fermentation system which comprises a plurality of fermentation tanks and a base, the last-stage fermentation tank is fixedly installed on the base, other fermentation tanks are sequentially installed above the last-stage fermentation tank, the primary fermentation tank is installed at the uppermost position, annular jackets are fixedly installed on the peripheries of the other fermentation tanks, and the annular jackets are arranged on the base. One end of the annular jacket is connected with a sliding rod, the sliding rod is slidably mounted on a sliding frame, the sliding frame is slidably mounted on the base, a longitudinal slide way is arranged on the sliding frame, one end of the sliding rod extends out of the sliding frame, and one end of the sliding rod is fixedly connected with a lifting driving mechanism; the bottoms of the fermentation tanks are sequentially communicated with the feed pipes of the fermentation tanks below through discharge pipe