With Andamu River of suburban Beijing City as the research object, representative indices inclu-ding river ecological features, hydrological characteristics, morphological features and landscape entertain-ment functions were selected in this study. Based on the comprehensive index analysis method with incorpo-ration of certainty and uncertainty of pair analysis, the ecological environment of the river was evaluated and classified into four categories： same, partially different, largely different and totally different. At the same time, the evaluation results were analyzed by adopting spatiotemporal analysis. The results show that the lo-cal ecological environment of the Andamu River was almost completely destructed in recent years. Urgent measures such as strengthening river management, treating rural wastes reasonably and effectively, reducing unnecessary human activities and balancing tourism development and ecological management should be em-ployed the key contents of river ecological regulation in the next step.