We have carried out the development about the formation of micro concavo-convex structure by using carbon nanotubes on the surface of diamond abrasive powder. The diamond abrasive powder coated by difference size of CNT with chemical bonding has been prepared. Mr. Katsuhito Aoki gave the poster presentation, on September 3rd (presentation number B50 ) at ABTEC2021 (Abrasion Technology Conference, held by on-line on Sept 1-3, 2021), entitled with “Preparation of diamond abrasive powder coated by difference size of CNT with chemical bonding and its characterization”. Further development is expected.