Fisheries stock assessments often rely on time series of abundance indices obtained from annual surveys. Thus, it is important to maintain the temporal continuity of such series when vessels have changed. This can be achieved by estimating conversion coefficients between the two vessels through an intercalibration experiment. This paper describes such an experiment conducted between the commercial trawler "zheshengyu10201-10243" (standard vessel) and the research vessel "zhongyuke211" (experimental vessel). Two analytical techniques were applied to compare trawl data and obtain fishing power correction factors for twelve major species and four species-group combinations caught by the two trawlers. Fishing power correction techniques included ratios of catch per unit effort (CPUE) and the Kappenman method. The results showed that 74 and 84 species were identified from the standard trawler and the experimental vessel, with catch rates range of (47.27-1836.72) kg/nmile², and (12.28-311.85) kg/nmile², respectively. The standard vessel had high catch rates of , The catch rate range were (1.17-1113.26) kg/nmile² and (0-565.39) kg/nmile², respectively. However, were the top two species caught by the experimental vessel, with catch rates range of (0-277.59) kg/nmile² and (0-125.24) kg/nmile², respectively. The trends of capture rate varied with depth showed differentiation between the standard vessel and the experimental vessel. Eight species/groups showed similar changes in capture rate by depth, including species-group, fish-group, Apogonichthys lineatus, . Five species/group showed the opposite trend in capture rate by depth, including crustaceans, Amblychaeturichthys hexanema and Harpadon nehereus showed mixed changes in catch rate at different depth stratum, which was related to the vertical expansion and the position of the net mouth. The ratio of mean CPUE and the Kappenman method estimated the total catch fishing power correction factor (FPC) to be 0.35 (95% confidence interval 0.24-0.61) and 0.43 (95% confidence interval 0.27-0.70), respectively. FPC values based on the ratio of mean CPUE ranged from a low of 0.03 for . The FPC was significantly different for five species-groups (Larimichthys polyactis and . It was necessary to correct the CPUE data by applying the estimated correction factor. The harvest of the standard vessel was dominated by near-bottom species, which represented its excellent performance in capturing economically important commercial species. However, the composition of the standard vessel's harvest was not strongly representative of the ecosystem. The experimental vessel was suitable for the investigation of shallow water areas. In deep water areas, due to insufficient vertical expansion and settlement of net mouth, it had difficulty capturing species reflecting the composition of the near-bottom ecosystem.