In order to achieve an objective and fair evaluation of the integrity quality of cement-treated aggregate base layers(CTAB), eliminate the randomness of quality evaluation of 7 d core samples, and make up for the limitations of construction quality evaluation due to the lack of consideration of climatic characteristics and highway grade, five highways, including expressway, primary, secondary and third-grade roads are selected, a large number of core tests are carried out on CTAB at 7 d age, and the condition of cores are systematically investigated, statistically analyzed, according to the influence on pavement structural performance, cores category and grade are classified. According to the integrity degree of the core, it can be divided into three categories: integral class, incomplete class and loose class, the difference in the integrity of the core represents the difference in its diffusion load stress capacity, based on the density, the cores are further divided into eight grades, the difference in core density reflects the difference in using function, the calculation method of core integrity rate is proposed, and the principle of determining the technical standard of core integrity rate is determined, F(Ⅰ+Ⅱ) should be used as the evaluation index for seasonal frozen area, and F(Ⅰ) should be used as the evaluation index for non-seasonal frozen area. according to the regression curve, the technical standard of core integrity rate for different grades of roads in different areas within 7 days is proposed. The results show that the core integrity rate and road grade showed a linear trend, and the influence range of road grade is 2%-9%, the influence range of coring-mode is about 10%, and the influence range of climate is about 5%. The research results achieve the quantitative evaluation of cores quality and integrity properties of semi-rigid base.