The aircraft industry plays a great role in our country's social and economic development progress. The mutual cooperation of all airlines is probably to give the aircraft industry sronger competitive capacity.For Chinese airlines, the road to development, which is called from small to large and from large to srong, is the only way that the Chinese airlines participate in the international competition of Air Transport industry.This text introduced the merger and its reason of foreign airlines, and tried to describe the advatanges of the merger. Then the essay analysed the meger of Chinese airlines and its advantaged and disadvantaged. At last, the text made a conclusion and gave some suggestions.