Agricultural mechanical equipment for smashing straw and returning straw to field

The utility model provides straw smashing and field returning agricultural mechanical equipment which comprises a processing box, a smashing mechanism and a moving mechanism are fixedly installed on the inner side of the processing box, the smashing mechanism comprises a rotating rod rotationally connected with the inner side of the bottom of the processing box, a turning cutter bar is fixedly installed on the outer side of the rotating rod, and a processing chamber is formed in one side of the processing box. A crushing cutter bar and a transmission rod are connected to the inner side of the treatment chamber in a penetrating mode, first rotating wheels are fixedly installed on the outer side of the transmission rod, the outer sides of the two first rotating wheels are sleeved with first transmission belts, and the outer sides of the first rotating wheels are sleeved with second transmission belts; the straw treatment device has the advantages that straw entering the treatment box can be crushed through the