Traditional graphic design methods provide designers with design materials through templates, which cannot reflect their true design intentions. To this end, a new planar design method based on 3D virtual vision technology is proposed. Provide a development environment, use a mouse for hand drawing, and form a stroke by obtaining an ordered sequence of points. Complete the denoising process of hand drawn strokes through smooth denoising methods, and fit the hand drawn strokes through quadratic B-spline curves. On this basis, 3D virtual modeling is performed on hand drawn strokes to achieve graphic design. After establishing a 3D model of a graphic design work, color rendering is used to improve the visual effect. The experimental results show that the proposed method can effectively achieve 3D virtual modeling based on hand drawn strokes, making the obtained 3D renderings more realistic, meeting the requirements of designers, and helping designers demonstrate real design intentions. The comparative experiment of simulated platform usage environment design shows that the application of an indoor design platform based on 3D virtual vision can draw indoor design plane images and three-dimensional images, and the position of the indoor landscape in the images is more in line with practical needs.