The utility model relates to a brush electric machine separating commutator. The circular column which is composed of the mutual insulating red copper piece, is separated with the column head. Each red copper piece which is tightly sleeved on the column head of the electric machine rotor shaft, is welded with the correspondingly motor coil winding. The circular column which is in sliding sleeved on the electric machine rotor shaft and is composed of the mutual insulating red copper piece, is integrally connected with the column head which is tightly sleeved on the electric machine rotor shaft by an inner hexagon socket-head bolt penetrating the positioning bolt hole. The circular column surface is abraded after the sliding contact with the electric brush, as long as the bolt is screwed off and a new circular column is replaced, which is very convenient. The utility model has the advantages of novel structure, convenience dismounting and cheap cost.