In order to explore the effect of aggregate gradation on compaction characteristic of asphalt mixture，gyration compaction tests were conducted out on eight asphalt mixtures gradation. The partial least squares method was adopted to analyze the influence of the Bailey method parameter on the construction energy index(CEI)and the CEI96. The LC-16 grade was then optimized. The results show that the parameter CA of Bailey method has the maximum influence on the construction energy index. The recommended values of CEI and CEI96 for the LC-16E are 22.86 and 220.42 respectively. The average void ratio is 3.888% by 26 times of gyratory compaction test. The average gradient is 0.372 resulting from gradient method. The pavement performance can meet the specification requirement.