Abstract: The technology of using electric field to enhance the inter-phase dispersion of multi-phase systems is widely used in chemical industry. The bubble growth process determines the size and dispersion characteristics of the detached bubbles, which are important factors affecting the heat and mass transfer efficiency. To this end, a visual experimental system of electrostatic gas-liquid dispersion was built, and the micro high-speed photography technology was used to conduct microscopic visualization investigations into the bubble growth process in liquid dielectrics under non-uniform electric field. By processing and analyzing the microscopic images of the bubble growth and detachment process obtained from the experiments, the dynamic characteristics of the growth deformation and detachment of the bubbles were summarized. The experimental results indicate that the bubble growth can be divided into four distinct patterns, including the dripping separation, the cone separation, the kink separation, and the branching fragmentation. Affected by the charge relaxation effect, free charges are locally aggregated at the gas-liquid interface, resulting in a non-uniform Coulombic force, which is macroscopically characterized by bubble surface fluctuations. As the electric field intensity increases, the bubbles are stretched in the direction of the electric field and the fluctuation degree of the gas-liquid interface is intensified. The stability of the gas-liquid interface is weakened by the electric field forces and the bubbles finally break up into a cluster of micro bubbles. This research can provide a reference for controlling the bubble detachment size and frequency under the electric field.