Circuit breaker and static side tail airflow channel structure thereof

The invention relates to a circuit breaker and a static side tail airflow channel structure thereof. The circuit breaker static side tail portion airflow channel structure comprises a cylindrical static side supporting conductor and a flow guide cover. The air guide sleeve is fixedly sleeved on the outer side of the static side supporting conductor; the cover wall of the flow guide cover and the cylinder wall of the static side supporting conductor form an airflow channel; a bottom overflowing channel is formed between the rear end of the static side supporting conductor and the rear end of the flow guide cover; and/or the rear-end cylinder wall of the static-side supporting conductor is provided with a rear-end cylinder wall overflowing channel so that airflow in the inner cavity of the static-side supporting conductor can flow into the airflow channel, and the cylinder wall of the static-side supporting conductor is provided with an inclined flow guide hole communicating with the airflow channel and the inn