The utility model relates to a separation and reunion formula maize picker header, include mounted frame, header frame, divider, pluck ear of grain device, drive arrangement, decelerator, its characterized in that: decelerator comprises a plurality of transfer gearboxes, drive arrangement is by the header main shaft, a plurality of driven shafts, a belt pulley, three rows of sprocket transmission mechanism, the clutch, the middle transmission sprocket I, constitute with the middle transmission sprocket II that middle transmission sprocket I is connected, the driven shaft corresponds the position of clutch and middle transmission sprocket I and establishes to the integral key shaft, the clutch is by locating the epaxial spline housing of spline, a supporting plate, the connection pad, locate and move the interlock ring gear on the connection pad, decide the board, locate decide on the board with move the interlock of interlock ring gear decide the interlock ring gear, with the backup pad with decide the bolt that the board linked together and organize, the top is leaned on and is formed in the spring that moves between interlock ring gear and the backup pad. Its structural design is reasonable, use safe and reliable, is showing the fault rate that reduces maize picker.