The utility model relates to a small -size fruit detects hierarchical turning device is carried to small -size fruit, a small -size fruit is carried and the rotation that it is hierarchical that is used for small -size fruit to detect, this turning device is carried to small -size fruit includes the reach, small -size fruit limit baffle, fastening screw, the friction tape, the conveying chain, wherein, the reach both ends are equipped with the pinhole, can be connected with carrying the chain, simultaneously provide the support for small -size fruit limit baffle, one side that small -size fruit limit baffle bottom is close to the friction tape is glossy arc shape, reduce with the friction of friction tape and prevent that card extremely, wherein, so that cooperate with the reach, U type groove with carry the chain to advance opposite direction's one end to open threaded hole, so that fastening screw fixes small -size fruit limit baffle on the reach, guarantee that small -size fruit limit baffle is in the stability of in -process of advancing, the utility model discloses simple structure, the detection of the small -size fruit of mainly used is hierarchical, but reduction in production cost has certain practical value.