Aiming at the problem of early failure of bucket tooth due to serious wear in the course of using, the failure form and reason of bucket tooth surface are analyzed, and the improvement measures are put forward.The failure of bucket teeth under different working conditions is caused by different degrees of wear and impact.Bucket teeth in normal working conditions for 3 days (about 36 hours) before failure, no matter from the economic point of view or use Angle is not in line with the requirements.It can be seen from the macroscopic photos of the batch of invalids that the front face of the bucket tooth has obvious furrow scratches, the tooth tip has a little plastic deformation, and no cracks.The front face (the surface in contact with the ground) is the thinnest, about 4mm, and the rear face about 8mm.