Pursuing the green manufacturing(GM) of products is very beneficial in the alleviation of environment burdens. In order to reap such benefits, green manufacturing is involved in every aspect of manufacturing processes. During the machining process, cutting fluid is one of the main roots of environmental pollution. And how to make an optimal selection for cutting fluid for GM is an important path to reduce the environmental pollution which incurred by application of cutting fluid. The objective factors of decision-making problems in the traditional selection of cutting fluid are usually two: quality and cost. But from the viewpoint of GM, environmental impact(E) should be considered together. In this paper, a multi-object decision-making model of cutting fluid selection for GM is put forward, in which the objects of Quality (Q), Cost(C) and Environmental impact (E) are considered together. In this model, E means to minimize the environmental impact, Q means to maximize the quality and C means to minimize the cost. Each objective is analyzed in detail too. A case study on a decision-making problem of cutting fluid selection in a gear hobbing process is analyzed, and the result shows the model is practical.