The invention discloses a high-performance carrot computer vision track defective product removing and length and thickness grading device. The device comprises a computer vision track defective product removing device, a corrugated type length grading device and a strip roller type thickness grading device. The computer vision track defective product removing device is composed of a plane conveying track and a computer vision grading system according to the core. Carrots are conveyed into the computer vision system through the plane track. The computer vision system takes photographs of the carrots to judge whether the carrots are defective products or not, and controls a gas gun array to blow the defective products out. Good products are conveyed into the corrugated type length grading device through a conveyor belt. The device is composed of a set of corrugations with different gaps and a vibrator. The carrots with the different lengthens fall off from the different gaps, length sorting is completed, the carrots with the same length and the different thicknesses are conveyed into the strip roller type thickness grading device, the device comprises two long carrier rollers between which a certain angle is formed according to the core, the carrots with the different thicknesses fall off in different positions of strip rollers and enter a grading box, and thickness grading is achieved. The device is high in grading efficiency, and the defective products, the length and the thickness of the carrots are graded automatically.