Novel fertilizer field returning device and method

The invention discloses a novel fertilizer field returning device and method. The device comprises a closestool, a supporting base is fixedly connected to the bottom of the closestool, a fixing base is fixedly connected to one end of the closestool and one end of the supporting base, a guiding funnel is movably arranged on the inner wall of the closestool, and a stirring groove is formed in the top of the supporting base; the inner wall, corresponding to the top position of the stirring groove, of the closestool is fixedly connected with a limiting plate, and the inner wall of the stirring groove is rotationally connected with an extrusion screw rod through a bearing. The positive and negative motor controls the extrusion screw to rotate clockwise, excrement, coal ash, charcoal and biological bacteria in the stirring groove are conveyed and extruded, a mixture enters the discharging pipe through the extrusion hole, enters the discharging pipe from the discharging pipe and finally enters the collecting bag, an