The utility model provides a containerless casting former that can automatic sediment outflow, be with the sand mould by machined surface downward sloping or perpendicular the setting, carry out cutting process to the sand mould by numerical control cutting equipment, at the in -process of processing, the antiquated sand that cut is under the effect of self gravity, naturally among the row row of the falling sand groove. Its equipment includes numerical control cutting device, sand box station control device, waste material transmission band, and numerical control cutting device and sand box station control device are fixed in subaerially side by side, and numerical control cutting device's processing position department is arranged in to the sand box of installation on the sand box station control device, and the waste material transmission band is installed between numerical control cutting device and sand box station control device, sand mould machining -position progressive's below. The utility model discloses do not increase the jetting device or adopt manual cleaning in not being used in equipment, can solve the problem that double -layered sword, milling cutter are piled up to the antiquated sand to simplified equipment, saved manpower and materials, reduced the manufacturing cost of containerless casting.