Abstract: The method of testing mechanical properties of materials by existing ball indentation was improved and the load-depth curve of metal material was obtained by a continual cycle loading method instead of multipoint single loading method. The dimensionless functions and related apparent strain function during indenter pressing into metal material were fitted by dimensional analysis and finite element anslysis, and the elastic-plastic parameters and stress-strain curves of different metal materials were obtained and verified by the test data. The results show that the error of elastic-plastic parameters between the caculation results obtained by this method and the test data was about 5%. The stress-strain curves were in good agreement.