Four Kinds of major tactic of fencing are active attack, riposte, simultaneous attack, and counter attack. Active attack and simultaneous attack are active attack tactic. Riposte and counter attack are defensive attack tactic. This study uses statistical methodology to analyze the influence on fencing tactics in competition base on the world Junior and Cadet Championship. The purpose is to find the best guiding principle of attack or defensive tactic on ordinary training and actual competition. Result of study, we find that attack tactic for getting point and win or loss have remarkable influence. According the analysis of the total point, active attack got 91 point, and 45.5%. Obviously, active attack is one of the most important tactics. On ANOVA and Duncan analysis, all fencers' major tactic uses active attack, but active attack getting point between wins and loss did not have significant difference. Winner gets the game, the most important key point is not on active attack, is on tactic using of counter attack. In this study, we suggest fencers in primitive attack tactic training should major in active attack. Defensive riposte and counter tactic training should major in active attack. Defensive riposte and counter attack training are the next. For international fencers, who want to win the competition, then tactic training of counter attack is very important factor. It is the best guiding principle of attack or defensive tactic and strategy using on ordinary training and actual competition.