Electrostatic charges, which can influence the hydrodynamics of gas-solid flow, play an important role in gas-solid fluidized bed reactors. The performance of a fluidized bed is related to particles motions, while gas-solids contact are majorly governed by its bubble characteristics. Therefore, bubble phenomenon is particularly important in multiphase flow structure. In this work, glass bead are used as bed material particles, single bubble injection experiments are carried out on a two-dimensional Plexiglas bed. Different superficial gas velocities produce different levels of electrostatic magnitude. After a long-time fluidization, the electrical charge density of the particles reaches stable value and is measured by a faraday cup collected to an electrometer, and then, single bubble is injected into the bed. The bubble rise is recorded by means of Digital Image Analysis (DIA) to obtain excellent snapshots of bubble deformation. The results show that, in the high charged system, the aspect ratio gradually decreases as the rising height increases. The simulation of single bubble injection is implemented by Two Fluid Model (TFM), coupled with electrostatic model, to reproduce qualitative trends in the electrostatic field distribution, stress of the particles and particle movement Numerical simulations interpret the deformation of bubbles from the direction and magnitude of electrostatic forces on particles around bubble. (C) 2017 Elsevier B.V. All rights reserved.