The comprehensive and efficient characterization of components in traditional Chinese medicine is crucial for elucidating its active constituents and uncovering its mechanism. Identifying the compounds of the Bushen Huoxue Prescription (BHP) is difficult because of its complex composition and the large difference in concentration among its compounds. In this study, a hydrophilic interaction liquid chromatography coupled with reversed-phase LC (HILIC × RPLC) offline 2D-LC tandem high-resolution mass spectrometry method was established to analyze the total compounds of the BHP. Database screening and molecular networking were performed to identify the compounds. In contrast to conventional 1D chromatography, 2D chromatography increased peak capacity, enriched trace ingredients, and prevented the masking of high-abundance compounds. A total of 165 compounds were identified, and 14 potential compounds needed to be further identified. This study provided an effective method for comprehensively analyzing the complex system of traditional Chinese medicine compounds.
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