With the aim to discuss the availability of CT（computerized tomography）non destructive test (NDT) of Fuji apple’s major components, a method based on X-ray CT was adopted to collect the CT information in Fuji apples. The CT information was used as the input of neural network to forecast the major components of Fuji apple. The results show that the average forecast errors of moisture content, sugar content and acid content are 1.75%, 5.81% and 0.72% respectively, and the precision of this method can meet the requirements of Fuji apples NDT. 