The invention provides a feeding assembly for a fertilizer applicator of a rice planter. The feeding assembly comprises a feeding device, wherein a cleaning device is arranged on the feeding device; the feeding device comprises a poking roller and a poking slot arranged on the poking roller; the cleaning device is arranged as a hairbrush for cleaning the poking slot; the hairbrush is electrically controlled; a motor for controlling the hairbrush to clean the poking slot is connected with the hairbrush. The feeding assembly provided by the invention is equipped with a cleaning hairbrush used for cleaning the residual fertilizer in the poking slot and a specially arranged anti-residual poking slot; the fertilizer accumulation can be effectively prevented; the defect of fertilizer caking on the poking slot can be overcome; the fertilizer can enter into paddy field in a more accurately quantitative way; the motor is arranged as the power source of the cleaning hairbrush, so that the electric automatic control can be realized; the starting and stopping of the motor can be automatically or manually adjusted according to the production operation environment so that the starting and stopping of the hairbrush can be controlled.