As journal evaluation becoming increasingly important, domestic journal evaluation study focused on the evaluation index, and often overlook evaluation toolscitations database. In fact, the choice of different citations database often gives disruptive impact on the evaluation results. Choosing the Chinese Social Sciences Citation Index (Chinese Social Sciences Citation Index) and the Chinese Citation Database (Chinese Citation Database),two popular domestic citations database, as an evaluation tool library, making CSSCI LIS field of 14 kinds of source journals over the past 10 years as the research objects, the paper from published articles, cited volume, cited rate，h index， fully analyzed and compared with the impact of different Citation Databases on the evaluation outcomes. The paper uses correlation analysis to demonstrate the size of this effect, gets the conclusion that different citation database leads to the impact of important evaluation indexes greater than ordinary indexes. Based on the analysis the results, we put forward some relevant suggestions for improvement.