Processing device for preparing selenium-rich organic fertilizer by utilizing plant straws

The invention relates to the technical field of agricultural product processing equipment, in particular to a processing device for preparing selenium-rich organic fertilizer by using plant straws, which comprises a cutting box, a crushing mechanism and a cutting mechanism are arranged in the cutting box in a liftable manner, and a feed port and a discharge port are respectively formed in two opposite side walls of the cutting box. A discharging mechanism is further arranged in the cutting box and located below the crushing mechanism and the cutting mechanism, the discharging mechanism, the feeding port and the discharging port are located at the same height, and the discharging mechanism can horizontally slide along the discharging port and the feeding port. A cleaning mechanism and a scraping mechanism are further arranged in the cutting box, the cleaning mechanism can clean the cutting mechanism when the cutting mechanism ascends, and the problems that after an existing straw crushing device crushes straw