Gliding arc discharge plasma has obvious advantages in the aspects of broadening the ignition and extinction boundary of combustor, reducing ignition delay time and improving combustion efficiency. On the basis of exiting technology of fuel pyrolysis dome, this paper optimizes the position of gliding arc discharge and innovatively develops the pilot flame dome based on gliding arc discharge plasma actuation. And the experimental study on discharge characteristics is carried out to investigate the arc dynamic characteristics, gliding mode, average breakdown voltage, power under conditions of different airflow rates and input voltages. The results show that the Pilot flame dome can form a stable rotating gliding arc discharge area between Venturi tube and fuel nozzle, and there are two different discharge modes, i.e. Steady Arc Gliding (A-G) mode and Breakdown Gliding (B-G) mode, which are significantly affected by the airflow rate and input voltage. When the airflow rate is less than 200 L/min, the discharge is mainly in A-G mode at the input voltage of 140~240 V, and develop to B-G mode with the increase of airflow rate. However, the proportion of A-G mode increases gradually with the increase of input voltage. The average breakdown voltage and rotating angular velocity decrease with the increase of input voltage or the decrease of air flow, but the average discharge power increases with the increase of input voltage.