After Biden took office，the US Arctic policy took a new turn. On the basis of selectively inheriting the Arctic policy of the former trump administration，the Biden administration integrates the issues concerned by the Democratic Party，and gradually forms an Arctic strategy with typical democratic values. The Biden administration focused on political，economic and military dimensions and made in-depth adjustments to Trump’s Arctic policy，including four aspects：relevant Arctic government institutions and personnel arrangements，military strategic priorities，Arctic oil and gas development policy and Arctic infrastructure construction. These adjustments are mainly based on the urgent need to improve the Arctic capability of the United States，restructure the alliance system，and establish the image of a global leader in addressing climate change and promote the improvement of the development of the Arctic region of the United States. However，due to the opposition of moderate Republicans and Democrats in the United States and the chain effect of the international situation caused by the conflict between Russia and Ukraine，the shaping and implementation of Biden administration’s Arctic policy is facing dual challenges at home and abroad.