Smoke alarm capable of directionally eliminating condensation interference

The utility model relates to a smoke alarm capable of directionally eliminating condensation interference. The smoke alarm comprises a shell, a smoke detection bin and a condensation recognition bin are fixedly arranged in the shell. The smoke detection bin is provided with a first smoke inlet; a transmitting tube, a first receiving tube and a partition plate are fixedly arranged in the smoke detection bin; the smoke detection bin is provided with a light emitting channel; the condensation recognition bin is provided with a light inlet channel and a light transmitting piece. A reflection column and a second receiving tube are fixedly arranged in the condensation identification bin; the reflection column is used for reflecting the detection light emitted by the emission tube, and the secondreceiving tube is not in the emergent area of the light reflected by the reflection column; the second receiving tube is positioned at the middle upper part of the condensation identification bin; the condensation recognitio