Britain was the main conflict in the west. And the United States’ policy toward Germany was subject to this conflict. In order to create in Europe a balance of power which was in the United States’ favor, and to prevent Britain and France from controlling Europe completely, the United States adopted a neutral policy toward Germany, and did help the recovery of Germany. And Germany wanted to absorb a lot of fund to recover her economy and rebuild her army, with the hope of regaining the position as one of the western powers. So it was necessary for both two countries to maintain good relationship between them. But with the rise of Nazi Germany, Hitler did adopt a very aggressive diplomatic policy, which seriously harmed the United States’ interests. So the United States’ policy toward Germany began to change. This thesis tries to analyze the United States’ policy toward Germany before the breakout of Second World War.