Abstract: Looking at the theoretical and practical works involving the evaluation for enterprise credit in China,the objectivity and scientificness of these works are in doubt by public due to the difference, randomness, and conflict of index systems and index coefficient of the evaluation for enterprise credit.The cause for this situation is lack of study on the relativity between evaluation index, and between enterprise credit and evaluation index.Therefore the double relativity about the evaluation for credit capacity of enterprise is discussed and the conclusion is drawn that the half of evaluation index could be substituted by the other index, less than the half of evaluation index is related to the enterprise credit and their evaluation weights are ascertained based on the index for credit capacity of enterprise and the relativity between enterprise credit.