Iron-core of motor stator

The utility model relates to an iron-core of the motor stator. Existing stator cores are folded and pressed together, which is liable to cause the error problem of depth of parallelism at the end-face on double sides of the iron-core as well as the error problem of iron-core inner bore perpendicularity at the end-face on double sides. The problem effects assembly precision of the end cap and the iron-core, and may cause large noise when the electric motor is operated. The iron-core provided by the utility model is composed of multiple punching pieces with mark grooves, and is characterized in that the iron-core includes the first punching piece group and the second punching piece group, wherein the upper part of the first punching piece group forms the first mark groove, and the lower part of the second punching piece group forms the second mark groove whose position is opposite to that of the first mark groove. The utility model can effectively reduce error of depth of parallelism at the end-faces of the dou