In order to fundamental study on the explosive strength as a punch of boxer after weighted training during 12 weeks were determined in fourteen boxer in Korean national college of physical education. As a results of this study the following conclusion were obtained: 1) In aspect of explosive strength that grip, push-ups and pull-ups test score were more high significantly increased after dumb-bell swing exercise added in weight training for experimental group, when compare those of data were excellent than the control group. 2) The correlation coefficient between pre and post-test score of grip strength was r=+0,924(p<0.01) in experimental group and that of control group was r=+0.912(p<0.01), respectively. It is hope that the information will be use for reference in future edeavors of study in the field of boxing and physical fitness for athletic science.