The long-term anti-skid performance of asphalt pavement depends on the skid-resistant and abrasion-resistant performance of aggregates, so it is very important to calculate the morphological characteristics of aggregates accurately and quickly. In the research, 88# calcined bauxite, a new type of high skid resistance road aggregate, was introduced. Image-Pro-Plus 6.0 (IPP), IBM SPSS Statistics 26.0 (SPSS) and other digital image processing softwares were used to analyze and evaluate the morphological characteristics of aggregates. Meanwhile, grey entropy correlation analysis was carried out to obtain the grey entropy correlation degree between the aggregate morphological characteristic parameters and polished stone value (PSV) under different polishing times. The results show that the morphological characteristic parameters of each aggregate can be accurately obtained by IPP software, and compared with traditional aggregates, 88# calcined bauxite has richer angular characteristics and higher roughness. According to grey entropy correlation analysis, the correlation between fractal dimension and PSV is the most significant.