In order to improve the reliability of assessment results and support sustainable management, evaluating the robustness of methods for standardizing catch per unit effort （CPUE） prior to stock resource assessment is necessary.Fishery stock assessments require long-term and continuous work, and their accuracy is critical for management decisions and species conservation.In this study, we analysed data from the Spanish longline fleet in the Atlantic Ocean between 1995 and 2022 to standardize CPUE in the Atlantic swordfish fishery using the sdmTMB method, and a retrospective analysis using Mohn's ρ method was conducted to validate the robustnessof 13 different time series of data （A-M）. The results demonstrated minor variations in the standardized CPUE outcomes across different time series. The retrospective analysis further validated the consistency of the standardized CPUE outcomes.The study concluded that the sdmTMB method for standardized CPUE of Atlantic swordfish exhibited high stability and can accurately reflect the relative resource abundance of this stock.This study provides substantial support for reliable resource assessment and scientific fisheries management decisions.