The invention discloses a full-automatic intelligent sheet selection machine for neodymium-iron-boron magnetic workpieces based on machine vision. The full-automatic intelligent sheet selection machine comprises a rack, wherein an upper computer, a PLC (Programmable Logic Controller), a communication conversion card and a main load-bearing steel plate are fixedly mounted on the rack; a loading transmission belt, a servo motor, a glass turntable, an approach switch, three solenoid valves, three pneumatic nozzles, three discharging cylinders, four image collection cameras, a coaxial light source and a backlight source are mounted on the main load-bearing steel plate; the servo motor is used for driving the glass turntable to rotate at a constant speed, thereby driving the workpieces to carry out uniform circular motion and sequentially pass through the approach switch, the pneumatic nozzles and the image collection cameras; the parts respectively carry out corresponding actions under the control of the PLC. The full-automatic intelligent sheet selection machine for neodymium-iron-boron magnetic workpieces is capable of effectively integrating hardware modules from the aspects of hardware structures based on the principle of machine vision, thus solving the problems of low detection accuracy, slow speed and high costs for detecting the neodymium-iron-boron magnetic workpieces.