It is insufficient to measure a country’s trade position and benefit with export competitiveness. This paper introduces sophistication coverage on high export advantage product index to make comprehensive judgment on export competitiveness and trade benefit. A higher SCHEAP index reflects a better trade position, on the other hand a higher possibility of immiserizing growth. In the end, this paper calculates the SCHEAP index with the data of China and Japan, whose result shows that Japan has a much higher SCHEAP index than China, which keeps in accordance with the reality.