Objective:To explore the feasibility and rationality of low-dose spiral CT scan in the examination for the head of rabbit and provide the basis for the low-dose CT scanning in the head of neonate. Methods:The technical parameters were 120 Kv,3 mm slice thickness and every slice was scanned using tube current of 200,110,70 mAs. Five same regions of interest were measured on every image. The homogeneity and noise level of CT were appraised. The technical parameters were 120 kV,3 mm slice thickness. 200,110,70 mAs were employed in each same slice. CT images were evaluated by four doctors using single-blind method,and 3 degrees including excellent image, good image and bad image. Results:The phantom measurement showed that the lower of CT dose and the lower of homogeneity. The lower of CT dose and the higher of noise leve1. The image quality had no significant diference between five conditions(pitch 1.0,200,110,70 mAs;pitch 1.5,200,110 mAs),(P > 0.05). Conclusion:Low-dose spiral scan for examinating the head of rabbit might not only guarantee image quality but also reduce the radiation during CT scan.