Abstract: The airflow distribution of electrostatic excitation filter (EEF) is one of the key technical issues that affect the performance of the device. According to the characteristics of internal flow field of the filter, the standard k-epsilon model was used to calculate turbulent viscosity, the SIMPLE algorithm was used for pressure-velocity coupling, and the then FLUENT model used for numerical simulation. The airflow distribution of the EEF under four distribution structures was simulated, and the corresponding overall airflow tracing line and the surface airflow velocity distribution obtained. The vertical airflow velocity of filter bag gap and maximum flux uneven amplitude were researched to verify the airflow uniformity under the structure of one airflow uniform plate and wind shield on both sides of the dust hopper. The results showed that under the structure of one airflow uniform plate and wind shield on both sides of the dust hopper, the airflow distribution in the filter bags was uniform. The airflow velocity on the surface of filter bag ranged between 0.05 to 0.15 m/s, and the maximum flux uneven amplitude is 0.09.