The part with an incline angle changing from 0° to 60°and the part with multi-angle are formed by normal direction slices. They are generated by the single point deposition and the intermittent processing based on inside laser powder feeding technology and KUKA robot. The optimized loading time is got from the ANSYS thermo dynamics simulation and corresponding experiments. The experimental results indicate that the forming slender structure part has a high precision and uniform section size. The biggest relative error is 1.6% and the surface roughness is 1.98~2.47 mm. The microstructures of the part at different incline angles are similar without apparent defect.