Based on computed tomography(CT) scanning and digital image processing(DIP) technique, distribution characteristics of different skeleton tightness ranges of circles whose radius is 1025 times larger than the equivalent radius of aggregates were compared. Skeleton indices of cement stabilized crushed rock material(CCRM) in scanning cross and longitudinal sections were proposed. Maximum dry density、compressive strength and these skeleton indices of laboratory produced CCRM by static pressure producing specimen method(SPSM) and vertical vibration compaction method with different vibration times and field drilled CCRM were compared. The results show the ranges of the twice equivalent radius is covering area of centroid for establishing skeleton indices; skeleton denseness index(C) and skeleton stability index(θ) can be used to capture density and stability of CCRM skeleton. All indices proposed get larger with compaction time increasing, but the increase amplification gets smaller. The work of SPSM indoors cannot match the outdoor compaction work; the work of 90s vibration compaction indoors matches common compaction work of constructing the semi rigid bases（common gradation and dosage）in Guangdong Province, China. There is a strong correlation between skeleton indices and the compressive strength after 7days, which indicates micro skeleton indices influences compressive strength significantly.