Fluorescence molecular tomography (FMT) based on CCD is developing rapidly these years. In order to get the density of forward model of fluorophore, we need to reconstruct the contour of target object. A new three-dimensional modeling method based on CT Back-projection algorithm with few-views is proposed in this paper. Binary pictures is captured by 180° scanning with the help of CCD camera, and then filtering and fitting is operated. Ultimately, surface fitting in three-dimensional modeling is completed by least-squares method. Traditional method of 3D contour reconstruction needs to scan for 360° while this new method needs only 180°, and modeling could be completed even if the projection angle is fewer. Moreover, this method provide a reference to combine FMT and CT into one system.