Multifunctional foldable drywall sander is used for sanding dry walls and ceilings, which could smooth the walls quickly and easily. The 360° swiveling head and five variable speed setting make this wall grinding machine adaptable. The built-in LED lights can improve the brightness of dark workplaces. The handle has an extendable and foldable design, which can easily reach the height and save storage space. The automatic vacuum dust collection system can absorb above 90% of dust when sanding the wall. Combined with the hose and dust bag, the ideal dust removal effect can be achieved.