The invention discloses an automatic copying CT support system. The automatic copying CT support system comprises a computer, an image shooting device, a control system, an adjustment system, a copying support and a zero-pressure mattress; the computer is in data connection with the image shooting device, a router and the control system, a hydraulic system is connected with the copying support, and the zero-pressure mattress is arranged on the copying support; the image shooting device is used for shooting the human body, the computer is used for conducting contour recognition on pictures, calculating out the proportion, forming a control instruction and transmitting the control instruction to the control system, and the control system is used for controlling the adjustment system to adjust the high and/or low positions of the copying support. According to the automatic copying CT support system, after contour recognition is conducted according to shooting data of the patient's body, height and position adjustment can be conducted on all copying support sheets, by cooperating with the zero-pressure mattress, the overall contour of the copying support and the human body parts are more fitting and comfortable, secondary damage to patients cannot be caused, and the most accurate CT image is obtained.