Direct experimental animal euthanasia device

The utility model discloses a direct experimental animal euthanasia device, and belongs to the field of animal experimental equipment. Which comprises a gas supply mechanism, an external carbon dioxide gas source is connected into the gas supply mechanism, and is characterized in that the gas supply mechanism comprises a shell (6), the surface of the shell (6) is provided with at least one containing groove used for containing a test cage box (3), and the end face, facing the containing groove, of the shell (6) is provided with a cage box butt joint opening (13) used for being in direct butt joint with the test cage box (3); and a gas supply pipeline connected with a carbon dioxide gas source and the cage box butt joint port (13) is also arranged in the shell (6). According to the direct type experimental animal euthanasia device, the test cage box is directly in butt joint with the air supply mechanism to carry out euthanasia on animals in the test cage box, so that the stress reaction of the animals caused