Multi-stage sorting device for spherical fruits

The invention provides a multi-stage sorting device for spherical fruits. The multi-stage sorting device comprises a rack, a feeding box, a rail, an image capturing device, an information processing system, a fruit receiving device and a screening device, the rail is obliquely arranged below a discharging opening of the feeding box, fruits can roll along the rail by self weight, the image capturing device captures fruit appearance information, the information processing system receives the information, the fruit receiving device is arranged at the tail end of the rail, the screening device is arranged at the downstream of the fruit receiving device, the fruit receiving device is rotatably mounted on the rack, a rotary power mechanism connected with the information processing system is arranged on the rack, the information processing system controls the rotary power mechanism to rotate forwards or reversely according to the fruit appearance information, the fruit receiving device is provided with a forward rotation station and a reverse rotation station, the fruits are transferred into a defective fruit collecting box at the reverse rotation station, and the fruits are transferred into the screening device at the forward rotation station. According to the device, quality screening of sizes and appearances can be achieved at the same time, fruits with good and bad appearances can be sorted out at the same time through one device, additional manual sorting is avoided, the labor intensity of workers is reduced, the work efficiency is improved, and the sorting of the fruits is more accurate and efficient.