Straw pulverizer

The invention relates to the technical field of agricultural machinery, and discloses a straw pulverizer which comprises a machine body, a straw feeding mechanism, a straw pulverizing mechanism and a pulverizing and discharging mechanism are sequentially arranged in the machine body, and a straw cutting mechanism is further arranged between the straw feeding mechanism and the straw pulverizing mechanism. The straw feeding mechanism comprises a first feeding roller and a second feeding roller which are arranged in parallel and rotate relatively, the first feeding roller and the second feeding roller are both rotationally connected with the machine body, and the straw cutting mechanism comprises a first cutting knife rest and a second cutting knife rest which can move oppositely or oppositely in a reciprocating mode. A first cutting blade and a second cutting blade are arranged on the first cutting knife rest and the second cutting knife rest respectively, the first feeding roller and the second feeding roller