Multi-stage biomass crusher

The utility model relates to the technical field of biomass crushing, in particular to a multi-stage biomass crusher. Comprising a feeding hopper, a machine barrel, a plurality of material stirring shafts, a plurality of crushing rollers and a feeding module, the feeding module comprises a torsional spring, a connecting plate, a weighing plate, a reading meter, a first magnet and a second magnet, one end of the torsional spring is fixedly connected with the feeding hopper, the connecting plate is fixedly connected with the other end of the torsional spring and located in the feeding hopper, the weighing plate is fixedly connected with the connecting plate, and the reading meter is fixedly connected with the connecting plate. The weighing plate is fixedly connected with the connecting plate and located above the connecting plate, the reading meter is connected with the weighing plate and located on the outer side wall of the feeding hopper, the first magnet is fixedly connected with the connecting plate and lo