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As a system distinguishing decision, the gray decision can solve most of the issues related to the gray fuzzy multi-criteria decision in real life. This paper establishes a gray fuzzy decision model based the English teaching quality, in order to evaluate the English teaching quality. The model defines the fuzzy set according to the index attributes, and gives the membership for the gray fuzzy relations between indices, and then obtains the weight results of each index based on the calculation of the gray fuzzy. Finally, this paper verifies the availability of the model through the actual teaching examples.