The principle of multi-point sectional forming for three dimensional surface parts with large size was introduced, and the material property parameters of aluminum alloy LF6 were tested. Then, the finite element model of multi-point sectional forming for double curvature convex part was built, the simulated procedure was elaborated, and the forming results and springback results of double curvature convex part for multi-point sectional forming were acquired. Furthermore, the influences of forming direction and transitional length on the forming quality were analyzed by numerical simulation. The results show that the smooth surface and uniform equivalent strain can be got by forming from the small end. However, the larger the transitional length is, the better the surface accuracy and uniform strain are, and the strain distribution is more uniform. Finally, the multi-point sectional forming experiment of double curvature convex part with large size was carried out, and the experiment part with good shape contour and surface accuracy was obtained. Thus, the validity of numerical simulation results and the practicability of multi-point sectional forming technology were verified.