The invention discloses a control method and device for rice milling chamber feeding and discharging. The control method includes the steps of (a) early-stage preparation, (b) traction rod position adjustment, (c) rice milling chamber feeding and discharging pre-commissioning, (d) rice milling chamber allocation adjustment, (e) rice milling chamber feeding and discharging regulation and control, and (f) hydraulic device working pressure adjustment. The device comprises a rice milling chamber and control mechanisms. A rice feeding movement valve is arranged at one end of the rice milling chamber, and a rice discharging movement valve is arranged at the other end of the rice milling chamber. Each control mechanism comprises a workbench, a hydraulic device and a traction mechanism. Each hydraulic device is provided with a pushing rod. Each traction mechanism comprises a traction base and a traction rod. The pushing rods are connected with the corresponding traction bases. By means of the control method and device, a feeding inlet meeting the size requirement of rice species and a discharging outlet meeting the size requirement of the rice species are started according to the categories of specific rice species, so that the sizes of the inlet and the outlet are effectively controlled, time and labor are saved, rice losses are reduced, and the head rice rate is increased. The control effect of the device is good, moreover, the control process can be completed only through two persons, and cost is reduced.