The invention relates to an intelligent numerical control machining center which comprises a rack and a worktable. The worktable is arranged on the rack and has longitudinal and transverse moving freedom degrees. Multiple T-shaped grooves are formed in the top face of the worktable and are arranged in a linear array manner in the longitudinal direction. The intelligent numerical control machiningcenter further comprises a protection cover, wherein the horizontal section of the protection cover is in a concentric square shape surrounding the worktable. High-pressure air spraying heads are arranged on the two opposite inner side walls, located beside the two ends of the T-shaped grooves, of the protection cover. The height of the high-pressure air spraying heads and the height of the T-shaped grooves are the same. Cross beams with the length direction being parallel to the longitudinal direction are fixed to the rack, and the two cross beams are symmetrically arranged on the two sides of the center of the rack in the transverse direction. The cross beams are connected with moving seats in a sliding manner in the length direction of the cross beams, and the moving seats are connectedwith air blowing spraying heads in a sliding manner in the vertical direction. The two air blowing spraying heads are obliquely arranged. Heightening devices are arranged on the moving seats, and thecross beams are provided with displacement devices. High-pressure airflow is used for blowing away chip mixtures and then blowing off the chip mixtures, and the T-shaped grooves can be conveniently cleaned without demounting a clamping tool.