The invention relates to a self-circulation gas-liquid two-phase separation tower and belongs to the field of paraffin machining equipment. The self-circulation gas-liquid two-phase separation tower is characterized in that the separation tower comprises a gas absorption device and a solution regeneration device, wherein a liquid exhausting opening is formed in the bottom of the gas absorption device and a liquid discharging opening is communicated with the solution regeneration device; the solution regeneration device is provided with an absorption solution circulation outlet; and the absorption solution circulation outlet is communicated with a general spraying pipe by a pipeline and a pump. When an absorption solution absorbs chlorine gas, the absorption solution is directly injected into the regeneration device to be regenerated; and the absorption solution regeneration device and an absorption tower are in an integrated structure so that the self-circulation gas-liquid two-phase separation tower is convenient to move and maintain.