Atomizer and electronic atomization device

An atomizer comprising:

• a first liquid storage tank including first internal space being configured to accommodate an atomization medium and an atomization cavity being formed inside the first liquid storage tank;
• a second liquid storage tank including second internal space being configured to accommodate a sacrificial medium, wherein the second liquid storage tank is provided with a first vent hole configured to allow air to enter the second internal space, a viscosity of the sacrificial medium is less than a viscosity of the atomization medium, the second internal space is in communication with the first internal space through a connection channel, and the connection channel is internally provided with a separator configured to allow the air to pass through and prevent the atomization medium and the sacrificial medium from passing through;
• an atomization core being arranged in the atomization cavity and configured to heat the atomization medium;
• and
• a leaked liquid collecting tank being configured to collect the sacrificial medium leaked from the second internal space through the first vent hole.