Oxygen adding equipment for wine tank

The invention provides oxygen adding equipment for a wine tank, and belongs to the technical field of wine production. The oxygen adding equipment comprises an oxygen supply source, oxygen inhalationassemblies and a connecting structure; the plurality of oxygen inhalation assemblies are arranged, the oxygen inhalation assemblies have oxygen inhalation spaces, and the volume of the oxygen inhalation spaces can be changed. According to the oxygen adding equipment for the wine tank, the pressure in the oxygen inhalation spaces is negative pressure, the pressure of the oxygen inhalation space becomes smaller along with increasing of the oxygen absorption space, the oxygen inhalation spaces is hermetically connected with tank openings of the wine tank, when the volume of the oxygen inhalationspaces enlarger to reach a preset volume value, a connecting structure starts communication between the oxygen supply source and the oxygen inhalation spaces to absorb oxygen from the oxygen supply source under the action of n