Abstract: Opening of Northeast Course makes the distance between North-East Asia and North Europe much shorter, which has great impact on Dalian Port, China. The gravity model and contrastive analysis are used to quantitatively analyze possible trade growth of Dalian Port due to decrease of the distance. The potential trade volume of countries along Northeast Course is estimated, which shows that great increase of trade volume via Dalian port is expected. The strategy to taking the advantage of Northeast Course opening is suggested.