Objective To study the influence of the dispersant content on the conductivity and surface properties of carbon conductive ink. Methods In the experiments, the dispersant Deuchem W-920 was taken as an example, and the single-factor analysis strategy was used to prepare ink with different conductivity via changing the proportion of dispersant. At last, Scanning Electron Microscope (SEM) was used to characterize the morphology of the ink film. Results Different proportions of dispersant led to certain difference in the performance of conductive ink. In particular, when the other conditions were constant, with the increase of the dispersant proportion, the conductivity of conductive ink firstly increased and then decreased. Conclusion The addition of dispersant played an important role in the performance of conductive ink. When the proportion of dispersant reached 7%, the volume resistivity reached 3.01×10-2 Ω·m, which could improve the conductivity of the conductive ink as well as the regularity of the ink film.