For the complexity and diversity of resource and environmental attributions in manufacturing process, a resource and environmental attributions evaluation method based on interval number is put forward. Also, the method considered the effect of the environmental uncertainty and measurement error. The method was used in the resource and environmental attributions evaluation of the key parts of dCi11 engine in manufacturing process, which found the green merit order of key parts in the engine manufacturing process. And the feasibility and practicality of the method was attested.