this paper first briefly introduces the porosity of asphalt concrete pavement rutting wa-terproof performance,speed,pavement asphalt aging speed,the influence of roughness attenuation speed four aspects;Secondly from mineral aggregate level coordination and powder content,asphalt content, degree of compaction,this paper briefly introduces the main factors affecting asphalt concrete pavement porosity;After the proposal in the concrete construction through reasonable choice of grading and mineral aggregate content,improve the degree of compaction,control oil stone ratio and compaction temperature these aspects to reduce the porosity in the asphalt concrete;Finally based on CT image scanning method of fractal theory was verified in the asphalt concrete spatial structure and the application of the analysis of characteristics of pore.%首先简要介绍了沥青混凝土路面孔隙率对车辙产生速度、路面透水性能、沥青老化速度、平整度衰减速度4个方面的影响；其次又从矿料级配合和粉料含量、沥青含量、压实度3个方面，简要介绍了影响沥青混凝土路面孔隙率的主要因素；之后建议在具体施工时通过合理选择级配和矿料含量、提高压实度、控制油石比和压实温度这几个方面来降低沥青混凝土中的孔隙率；最后基于 CT 图像扫描法验证了分形理论在沥青混凝土空间结构和孔隙特征分析中的应用，并提出将孔隙率的纵向分布标准差作为评价沥青混凝土离析状况、强度特性的评价标准。
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