An anti-inversion feeding device for a conical roller centerless grinding machine and a use method thereof relate to the processing technology of bearings and overcome the defects existing in the other similar technology. In the invention, the structure and the principle of the feeding device for the conical roller centerless grinding machine are undated, so that a conical roller with big and small ends is blocked outside a grinding area and can give an alarm or automatically kick an inverted roller out under the situation of no stop, thereby protecting an abrasive wheel, a guide wheel and a supporting plate, avoiding the losses of halt and stop production caused by the inverted big and small ends and repair and replacement of damaged parts and providing a powerful guarantee for reducing the production cost and improving the production efficiency.