Abstract: Gas flow is one of the influencing factors in the industrial application of dielectric barrier discharge. Clarifying the interaction mechanism between gas flow and discharge can help to find more suitable experimental conditions for industrial production. Consequently, a high temporal resolution dielectric barrier discharge measuring system is established to explore the influence of helium gas flow on the evolution of the discharge form, as well as the current pulse amplitude, discharge volume, discharge phase and other discharge characteristics. It is found that the introduction of 2 L/min (corresponding actual airflow velocity v=0.111 m/s) gas flow in the discharge gap will reduce the initial voltage of the discharge and promote the transformation of the discharge form from columnar discharge to filamentary discharge. Under the condition of a fixed applied voltage, the increase of gas flow velocity will change the distribution of charged particles in the discharge air gap and improve the uniformity of the discharge, thereby affecting the discharge form and discharge characteristics. At the gas flow velocity of 5 L/min(v=0.278 m/s), the charged particles produced by the discharge will be taken out of the discharge gap, and the discharge form will evolve from columnar discharge to uniform discharge at this time.