In view of the morphological and structural characteristics of brown rice, use the non-contact laser scanning technology to acquire original point cloud on brown rice surface in the multi-section circular scanning way. The Poisson reconstruction algorithm is used to reconstruct the smoothed point cloud with normal information to obtain the ideal three-dimensional model of brown rice surface. The results show that the reconstructed brown rice model has smooth surface, clear outline, and obvious details such as rice ditch and germ, which can provide an effective digital model for the later improvement of rice processing technology.