The invention relates to a bad fruit sorting device after box opening, for wholesale of agricultural and sideline products. The bad fruit sorting device comprises a dumping mechanism, a washing mechanism, a sorting mechanism, a detecting mechanism, a shock absorption mechanism and a fruit frame, wherein the washing mechanism is arranged on one side of the dumping mechanism; the sorting mechanism is mounted on the body wall on one side of the washing mechanism; and the detecting mechanism is arranged on the sorting mechanism. According to the bad fruit sorting device disclosed by the invention,the dumping mechanism is arranged, so that after box opening, fruits can be automatically dumped; a fruit box is placed on a placing plate, and a servo motor is started to drive a screw rod to rotate; under the effect of the screw rod, the placing plate is driven by a bevel gear to lift above a bracket frame; an electric telescopic rod is started to push one end of the placing plate to lift; in the lifting course, one end of the placing plate is fixed by a supporting rod, so that the placing plate can be assisted by a rotating shaft to rotate and slope; a rotating shaft is also arranged between the supporting rod and the placing plate, so that the sloping of the placing plate cannot be influenced, fruit boxes are convenient to automatically dump; and fruits in the fruit boxes are poured in the washing mechanism, and manual conveying is not needed.