Research on the Evolution of International Seabed Resource Allocation Regime and Changes of American Seabed Policy (Wang Jinqiang) Firstmover advantage on capital and technology decided that the U.S. supported free development policy on seabed resource allocation. At the beginning of seabed regime construction, developing countries posed a challenge to the U.S.-supported policy by their voting advantage and ultimately led to American withdrawal from international institution. The U.S. government chose to confront openly the international development system by making a series of “reciprocating state treaties” with other developed countries as well as by enacting domestic legislation to continue its domestic development activity. During the 1990's, the international community took the initiative to modify the former international seabed regime and signed the 1994 Implementation Agreement which guaranteed American free rights on seabed mining and her leading position in the distribution of seabed resources. In the end, the United States returned to the international multilateral seabed development institution by signing the new Agreement which reflected exactly the international institutions profound influence on American resource allocation policy.