The invention relates to the technical field of automatic tool changing numerical control machining, in particular to automatic tool changing numerical control machining integrated with carpentry plate cutting, engraving and sanding, and particularly discloses a numerical control engraving sanding composite machining center. The numerical control engraving sanding composite machining center mainlycomprises a sanding machine main device, a dust collector, a mechanical arm feeding and discharging device, a cross beam, a tool changer, a spindle, a side plate, an attraction electromagnet fixing plate, a lathe bed, an attraction electromagnet, a large sand roller, a small sand disc, a sucking disc electromagnet, a suction disc electromagnet fixing plate and the like. The defects that in the prior art, the automatic tool changing numerical control wood machining process is complex in procedure, low in work efficiency, high in equipment purchasing cost and the like are overcome, and the aimsthat one machine has multiple functions, the procedure is simplified, the work efficiency is improved, machining is precise, and equipment purchasing cost is saved are achieved.