The variety of the wear mechanism for color and black brushes under the same term analyzed,Anmalyzing the obvious reason of wearing difference of different material brush under the parameter homologies in some term of experimenting,studing on the wearing mechanism in different wearing regulation of positive and negative brushes and electric performence and mechanism performence wearing mechanism.

The improvement of the properties for black carbon-based brush prepared with vibrating ball-mill-ribbon mixer new technology using high temperature modified pitch as binding is summarized.