Common carotid artery dilator

The utility model relates to the technical field of experimental instruments, and discloses a common carotid artery dilator, the top end of a support arm of a dilating arm is provided with an adjuster, the bottom end of the support arm of the dilating arm is symmetrically provided with two groups of blood vessel supporting devices, the dilating arm and an adjusting arm are both of a U-shaped flaring structure, and the adjusting arm is provided with a U-shaped opening. One end of an arm rod of the arm force push rod is provided with a blood vessel fixing device which is combined with the blood vessel objective table in an opposite mode. According to the utility model, the size of the flaring of the distraction arm can be adjusted through the stretching adjustment of the adjuster, so that the blood vessel at the carotid artery of an experimental white mouse can be distraction at a proper length, and then the blood vessel objective table in the blood vessel supporter is pressed with the blood vessel fixer, so th