Abstract: This study examines the influence of needle flake aggregate content on the gradation of asphalt concrete aggregate, using a stepwise filling method and adopting skeletal stability as the sole criterion for assessing the quality of aggregate skeleton. A vertical vibration compaction device is used to prepare the specimens with needle flake contents of 0%, 20%, 25%, 30%, and 35%, respectively;Skeletal stability is evaluated comprehensively by combining the California bearing ratio（CBR） value,skeletal density, and porosity to determine the coarse aggregate gradation for different specimen sets.Aggregate gradation is designed using a composite gradation design method through blending coarse and fine fractions across the full-size range. The findings indicate that with an increasing content of needle-like aggregates, the stability of aggregate skeleton takes a trend of initial increase and then decrease. The optimal stability is observed at a needle flake content of 30%, while the least favorable is at the content of 35%.