Abstract: To analyze the main chemical components in breakable capsules for cigarette filter, the main volatile and semi-volatile components in three types of breakable capsules from eight batches of filters were analyzed. The dilutions and mixtures of the capsule contents were separated and determined by GC/MS after being dissolved and extracted by hexane. The GC/MS fingerprint spectra were aligned by retention times and chromatographic peaks of the main volatile and semi-volatile components together with relative retention values and relative peak areas. The quality consistency of chemical components in these breakable capsules from different batches was evaluated by comparing the values of Euclidean distance, angle cosine, Euclidean distance ratio and similarity from their dilutions and mixtures. The results showed that:1) Euclidean distance and Euclidean distance ratio could characterize the quality variation in chemical components to a certain extent, and could be used as important indexes for investigating the quality consistency of components. 2)The components in breakable capsules could be successfully distinguished from their dilutions and mixtures by the hierarchical cluster analysis. 3)The GC/MS fingerprinting with hierarchical cluster analysis was simple, rapid and suitable for evaluating the quality consistency of chemical components in breakable capsules for cigarette filter.