Since the game with same structure is carried out repeatedly in the repeated prisoner's dilem-ma game, the best strategy of participants mainly depends on the strategy that the opponent may adopt and their choice to denial and frank. Finite repeated game use generally backward induction in the decision-making ac-tion, namely from the last round of repeated game started forward reasoning to determine every step of the se-lection. In the repeated infinitely game, the other participants will have opportunit...