The invention relates to a wheat fertilizing device and method based on closed-loop regulation and control. The wheat fertilizing device comprises a rack, and a
fertilizer box, a counter-rotating type double-
helix fertilizer apparatus, a fertilizing amount monitoring device, a furrow opener and a fertilizing amount
control system which are mounted on the rack, the counter-rotating type double-
helix fertilizer apparatus comprises a left fertilizer apparatus shell, a right fertilizer apparatus shell, a counter-rotating type fertilizer apparatus
helix and a fertilizer apparatus
pipe; the rack comprises a cross beam, a fertilizer box mounting plate, a fertilizer box connecting plate, a fertilizer box supporting beam, a triangular fixing plate, a supporting beam supporting plate and a cross beam sealing plate; the fertilization furrow opener comprises a furrow opener main body, a reflection type fertilization
pipe and a furrow opener
plowshare; the fertilization amount monitoring device comprises a shell, a monitoring circuit board, a monitoring polar plate, a differential polar plate, a mounting bracket, a fertilizer
discharge connecting
pipe and a line pipe; the fertilizing amount
control system comprises an electric cabinet, a controller, a stepping motor, a stepping motor driver, a chain wheel, a
machine attitude sensor, a speed measuring
radar, a
radar mounting bracket and a motor bracket.