The invention discloses an adjustable head support for CT examination for imaging department, and relates to the technical field of medical instruments. The adjustable head support comprises a base seat, wherein a groove is formed in the upper surface of the base seat; a fixing ring is fixedly connected to the upper surface of the base seat; sliding sleeves are connected to the left and right sides of the surface of the fixing ring in a clamping manner; and sliding rods are sleeved to the sliding sleeves. The imaging department uses CT to check the adjustable head support, through the mutual cooperation of a clamping device, a rotary block, a threaded rod and a support plate, when a patient's head is placed on the support plate, people rotate the rotary block, the rotary block drives the threaded rod to rotate, and the threaded rod rotates under the action of a threaded hole to move upward, so that the angle at which the patient's head is lifted can be adjusted; and at the same time, avalve is opened, and a negative pressure ball is pressed, and the negative pressure ball inflates an airbag through a connecting pipe and an air inlet pipe, so that a clamping plate is more comfortable in clamping the patient's head, and the patient's head can be fixed more comfortably during CT detection.