The present disclosure provides a horn assembly and a dual-listening Bluetooth headset. The horn assembly comprising a housing and a horn. The dual-listening Bluetooth headset includes a horn assembly, the sound outlet of the horn assembly does not need to be inserted into the ear canal, but only needs to be hung on the outer ear. It is more comfortable to wear and submit. The sound from the horn assembly is transmitted along the air through the sound outlet in the area near the ear, which can relieve the stethoscope effect and the head effect.