The invention discloses a chip blocking and collecting screen for a machine tool. The chip blocking and collecting screen comprises a base and wheels fixedly arranged at the bottom of the base, wherein a vertical screen is fixedly arranged above the base, and vertical supporting plates with triangular cross sections are fixedly arranged at the two ends of the front side of the base; rotating shafts are respectively and fixedly arranged at the two ends of a discharging receiving plate, and the rotating shafts at the two ends are respectively inserted into the corners of the supporting plates ateach side; a fixing bolt with a threaded stud screwed in the edges of the two sides of the bottom of the discharging receiving plate is screwed in the outer side of the bottom of the supporting plateat each side in a penetrating way. Iron chip thrown out by machining a workpiece can fall into a storage area formed by the supporting plate, the base, and the discharging receiving plate under the blocking of the screen, the iron chip can be blocked to splash to affect the adjacent work stations, and the iron chip can be collected; after a certain amount of iron chip is reached, the fixing boltcan be unscrewed to open the discharging receiving plate, thus facilitating the discharging of the iron chip.