The invention provides a coreless motor magnetic steel detection device. The coreless motor magnetic steel detection device comprises an automatic feeding device and a motor magnetic steel assembling height identification device, wherein the automatic feeding device is provided with a detection work station and comprises a track groove and a kick-out device, a groove bottom board of the track groove is provided with multiple first type material blanking ports comprising blanking control valves and multiple hollow-out second type material blanking ports, the detection work station is provided with the first type material blanking ports, the kick-out device comprises a kick-out disc provided with two sets of kick-out forks and a material disc driving device used for driving the kick-out disc to do translation on a plane with same height as the track groove, each set of kick-out forks comprises multiple fork rods, and the motor magnetic steel assembling height identification device is in signal connection with the blanking control valves. The coreless motor magnetic steel detection device is advantaged in that the structure is simple, operation efficiency is high, and assembling quality of coreless motor magnetic steels on automatic coreless motor production lines can be automatically detected.