This study was to investigate and analyze technical aspects, used by quarter final male single players in 2020Tokyo Olympic of badminton competition, including technical usage and analysis on types of point loss. The subjects were eight games, eighteen sessions, in total. The research conducting observational method by analyzed the video image. The statistical analysis and discussion are concluded as following: (一) both techniques is significant difference (P<.05), Victory players technology used for attack, and the use of froe and back court around mobilize hitter; negative side use too much net lift and high clear, mostly hitting with passive. (二) the two sides ball placement is and some significant differences, Victor players gained and lost points in whole partition placement second, placement and placement of the midfielder three and four stroke significantly more than the other's, the negative side of the players ball placement of more lost points in the midfielder, second lost points in the left and right forecourt.