The invention discloses an improved carrot computer vision elaborate classification, feeding and discharging device. The device comprises a feeding device and a discharging device. The feeding device is a push plate type step feeder, and the discharging device is a flat belt type pneumatic classifying machine. The core of the push plate type step feeder is composed of two sets of fixed push plates. Under the drive of an eccentric wheel, power is provided for the push plates through a connecting rod, and step feeding of a carrot is achieved; and the core of the flat belt type pneumatic classifying machine is composed of a plane conveying belt and an eight-opening air gun, when the long carrot moves to the position of a corresponding classifying opening under the drive of the plane conveying belt, the air gun blows air, and fruits and vegetables are blown into the corresponding classifying opening. The feeding device and the discharging device are used in cooperation with a V-shaped conveying belt, a computer vision system and a control system the feeding and passing efficiency and the classification efficiency are improved, and automatic classification of carrots is achieved.