Straw fine crushing double-row stationary knife returning machine

The invention discloses a straw fine crushing double-row stationary knife returning machine, and belongs to agricultural machinery. A linear track is fixedly arranged on the lower end face of a seat plate, a rear fixed cutter plate is installed on the linear track in a hanging mode, a plurality of fixed cutters are fixedly installed on the rear fixed cutter plate, two lead screw supports and a motor base are fixedly installed on the upper end face of the seat plate, a lead screw is installed on the two lead screw supports in a supporting mode, an electric motor is installed on the motor base, and the electric motor is connected with the lead screw through a coupler. A hand wheel is fixedly installed on a lead screw, a stroke limiting switch is installed on a lead screw support, an adjusting driving sliding block is installed on the lead screw in a sleeved mode, a stroke limiting rod and a stroke pointer are assembled on the adjusting driving sliding block, stroke size scale marks are arranged on the upper end