Solution humidifying air conditioning unit with fresh air pretreatment device

The invention provides a solution humidifying air conditioning unit with a fresh air pretreatment device. The solution humidifying air conditioning unit comprises a solution humidifying air treatment unit and a first pre-cooling/heating device; the solution humidifying air treatment unit is provided with a first air inlet passage and an air outlet passage; and the first pre-cooling/heating device is positioned at the upstream of the first air inlet passage. The solution humidifying air conditioning unit reduces the irreversible loss, can achieve relatively high thermodynamic completeness, and remarkably improves the dehumidifying/ humidifying efficiency.