The problem of hard metal end milling cutter capacity for work increase on basis of tool physical stress strain properties modification by means of the formation of nano-structured multi level coatings on tool working surfaces with the use of filtered cathodevacuumarc deposition is developed. There is devel oped a system and a composition of three-component nano-structured multi-level composition modificating coatings for the deposition on working surfaces of end-milling cutters. The results of laboratory and industrial tests of end milling cutters with the developed coatings for the conditions of roughing and finishing are represented.