The recycling modes of EOL products are divided into three kinds, i.e. the producer's self-recycling, outsourcing and alliance organized by several corporations. With the characteristics of the different recycling modes discussed, a decision-making model is developed within the framework of EPR(extended producer responsibility) for the recycling behavior of enterprises in view of the decision on benefits, then the maximum benefit and the conditions under which it is available are discussed and expounded for different recycling modes. Such a conclusion is therefore drawn that the cost saving as a result of recycling materials is an increasing function of the profit arising from the recycling behavior of an enterprise and that the scale structure of a recycling alliance determines the cost for material recycling.