Paper recycling is recommended for economic reason in China, but it may be not worth the candle because recycling activities will discharge various kinds of pollutants that damage the environment. Therefore, two questions need to be verified: 1) What kinds of environmental impacts are caused by recycling; 2) From the standing point of environmental conservation, should we promote paper recycling? This research investigates on the case of paper making enterprises in Guangdong province, China. We conducted a quantitative evaluation on environmental impacts of a life-cycle of 1 ton coated white paper board. The life-cycle includes processes of materials acquisition, manufacturing, disposal, recycling and transportation. Then, basing on the result of LCA, we set three scenarios as “non-recycling”, “recycling once” and “recycling multiple times” for simulation analysis. The conclusions are as follows: 1) Under the premise of 40% paper recycling rate, the order of priority to reduction of environmental pollution is: “recycling multiple times”, “recycling once”, “non-recycling”. That means promoting paper recycling is recommended for environmental conservation. 2) Promoting paper recycling has positive effects of restraining environmental pollution in following categories: energy crisis, global warming, acidification, eutrophication, waste problem, photochemical oxidants. 3) When promoting paper recycling, pollution prevention measures must be strengthened in categories of resource depletion, atmospheric pollution and water pollution.