【摘要】：For a long time, Germany played a leading role in the European Union(EU), but in recent years it has reduced its investment in the EU affairs and lessened its enthusiasm for European integration due to its multiple frustrations in maintaining the unity of the EU and leading the EU in global affairs. As a result, its leading role in the EU is apparently on the decline. This change has taken place for the following reasons: internally,it derives from Germany's domestic political dilemma, changes in its social ecology, and structural defects in its economy; externally, it relates closely to the intensifying interest divides between EU member states, and the major-country global-scale game that is entering a new phase for which Germany is not yet ready. The decline of Germany's leading role in the EU will intensify rivalry between EU member states, impede the process of European integration, and cause further setbacks to the EU's global standing. Nonetheless, Germany is aware of this, and is now engaging in profound reflection and active adjustment. Accordingly, the German engine is expected to restart.