Abstract: It is of great significance to study the characteristic of gas-liquid two-phase dielectric barrier discharge (DBD) and understand its discharge mechanism deeply for further environmental and other industrial applications. In this paper, by diagnosing voltage-current waveforms, Lissajous graphics and other electrical characteristics and optical characteristics such as emission spectra and luminescence images, the effects of different liquid components to the discharge characteristics of gas-liquid two-phase DBD at atmosphere pressure were studied. The discharge characteristics of gas-liquid two-phase DBD in aniline and aniline with NaOH solutions were compared , the experimental results were used to calculate discharge power and transmission charge, the discharge mechanism was analyzed based on discharge theory. The results show that for gas-liquid two-phase DBD in aniline solution with NaOH, the discharge characteristic was significantly different from that of pure aniline, the discharge current is about twice that of pure aniline solution at the same voltage, the luminous intensity is stronger, the discharge power and the transmission charge are larger, and at 589 nm wavelength of the spectral characteristic graph Na atomic line appears, the conductivity of the solution was increased when NaOH was added, hence gas phase discharge intensity was enhanced and the discharge became stronger.