Cooling fan

The invention provides a cooling fan. The cooling fan comprises a support, a shell, a switch, a trigger part and a safety part. The shell is detachably connected to the support, a space used for mounting a wet curtain is formed between the support and the shell, the switch comprises at least one safety switch, the safety switch is mounted on the support, the trigger part is mounted on the shell and abuts against and triggers the safety switch, the safety part is mounted on the support or the shell, the safety part has a first state capable of blocking triggering of the safety switch, and a second state enabling the safety switch to be exposed, at least one safety switch is subjected to trigger blocking through the safety part, and only when the safety switch is in the closure state, the fan can be normally used. Therefore, under the condition that the wet curtain is not mounted, the safety switch is in the state that triggering is blocked by the safety part, the safety switch cannot betriggered to be closed,