As a popular mechanism of regional legal collaboration, regional administrative agreements strengthen the coordination among governmental behaviors to solve the crossregion public governance problems. But legal effects of regional administrative agreementsare are vague, which affecting the smooth implementation of the agreements and the stability of regional cooperation. So, we need to clarify the binding force regional administrative agreements have on the contracting parties and the administrative counterparts, the relationship between successive regional administrative agreements, the level of effects between the regional administrative agreements and the regulations within the jurisdiction of the contracting parties. To assure that the required effects of a regional administrative agreements be translated into the realistic effects, we should improve the external constraint mechanism, reduce uncertainty of regional administrative agreements with respect to legal basis, procedure of conclusion, text content, dispute resolution, etc.