Abstract: This article is to show, based on the GPU technology, how to realize limited angle projection data 3D reconstruction algorithm through the minimization of total variation image optimization criterion of iterative reconstruction algorithm for three-dimensional expansion. On the basis of this and by changing the scanning mode, the linear array detector limited angle projection data CT three-dimensional reconstruction is realized. Experiments show that the method can effectively realize the limited angle projection data reconstruction based on line scanning, and is a powerful supplement of limited angle projection data CT three-dimensional reconstruction by the surface array detector.