The invention relates to a device for standardizing a placement state of tapered roller bearings before a grinding raceway and provides an automatic feeding and face recognizing machine for tapered roller bearings. The automatic feeding and face recognizing machine for the tapered roller bearings comprises a feeding device and a face recognizing system; the feeding device comprises an automatic feeding vibration disk and a conveying belt; a spiral feeding track is arranged on the automatic feeding vibration disk; the face recognizing system comprises a face recognizing plate and a face overturning device; and the face overturning device comprises a U-shaped clamping plate capable of overturning the tapered roller bearings into the required states, a recognizing device arranged on the U-shaped clamping plate and used for recognizing the upper end faces of the tapered roller bearings, and an overturning driving device connected with the U-shaped clamping plate and capable of driving the U-shaped clamping plate to perform 180-degree overturning. The automatic feeding and face recognizing machine for the tapered roller bearings can achieve automatic feeding and can perform fast detection, then performs automatic face overturning according to the detection result to make the discharging state of all the tapered roller bearings kept consistent and is high in work efficiency, convenient and reliable to use and suitable for large-scale popularization.