The different behavior intention and related phenomena of every economic interest partare explored based on the game theory during the transformation from farm land to reforestation and felling trees forbiddenness in the poverty mountain area. The reasons of policy inefficient implemented are “zero- sum game” of every gamble part, so they could not break away from“prisoners dilemma” . Harmony mechanism whose center is cooperation and aim is in accordance with every part economic interest must be establi shed.