Route: Straw storage - drying - mechanical chopping - processing into powder - packaging storage. Technical points: (1) The moisture content of the processed grass straw must be below 15%. When the hand is twisted, the straw is split and continuous. (2) When processing roughage for different purposes, replace the sieves with different sizes of mesh. (3) Remove debris and rhizomes from the straw before processing. (4) Before starting the machine, the operator should be familiar with the performance and structure of the machine. (5) Check whether the machine is stable before starting the machine, whether the connection parts are loose, whether the rotor is flexible, whether the tightness of the belt is appropriate, and whether there is foreign matter in the machine. (6) It should be noted that the amount of feed should be uniform, do not overload for a long time, and do not feed hard objects into the body. When the machine is running, failure shall not be eliminated and it shall be found that the failure shall be eliminated immediately.