Abstract: To address limitations of existing evaluation methods for the low-temperature performance of chlorinated polyethylene cable sheathing materials, a rapid multi-scale evaluation system based on principal component analysis (PCA) was proposed. By integrating data from brittleness temperature (Tb), temperature retraction (TR), glass transition temperature by dynamic mechanical analysis (TgDMA), and elongation at break in low temperature (Eb), the following findings were obtained. In the combination of Tb, TgDMA and Eb, contribution rate of PC1 could reach 61.32%, with PC1 scores exhibiting a negative correlation with low-temperature torsion test results (r=−0.83). While, in the combination of Tb, temperature retraction at 10% (TR10) and Eb, contribution rate of PC1 was 48.65%, and PC1 scores showed a positive correlation with low-temperature torsion test results (r=0.63); Results showed that the model could reduce testing time by over 50% and improve data interpretability by 30%. Although the limited sample size (n=11) necessitated validation with larger datasets, the proposed multi-scale evaluation framework for low-temperature performance based on PCA could provide an innovative methodological reference for rapid material screening or optimization of formulations and processing techniques.