To investigate the effect of sulfur content on the precipitated phase characteristics and hydrogen permeation behavior of cold-rolled enamelled steel, this study took two types of cold-rolled enamelled steel with sulfur contents of 0.0078% and 0.028% respectively as the research objects. Thermodynamic simulation software was used to calculate the composition of precipitated phases under equilibrium state; combined with transmission electron microscopy (TEM), the precipitated phases were characterized and quantitatively analyzed; meanwhile, electrochemical hydrogen permeation experiments were employed to test their hydrogen permeation behavior. The results show that: In the cold-rolled enamelled steel with 0.0078% sulfur content, the precipitated phases are dominated by TiN, Ti(CN), and Ti?C?S? particles, whereas the steel with 0.028% sulfur content also contains a large amount of precipitated TiS. Compared with the steel with 0.028% sulfur content, the steel with 0.0078% sulfur content exhibits a significant reduction in large-sized TiS particles, an increase in the quantity of TiN and TiC particles, and a decrease in both the size and quantity of TiS and Ti?C?S?. For the steel with 0.028% sulfur content, its hydrogen diffusion coefficient is 0.515×10-6 cm²/s and hydrogen permeation time is 21.15min, while those of the steel with 0.0078% sulfur content are 0.586×10-6 cm²/s and 18.59min respectively. There are no significant differences in hydrogen diffusion coefficient and hydrogen permeation time between the two steels, indicating that both steels have good fish-scale resistance.