Machine tool using inside water discharging drill

The utility model relates to a machine tool, in particular to a machine tool using an inside water discharging drill. The machine tool using the inside water discharging drill comprises a machine-tool outer shaft sleeve (1), a machine-tool main shaft (2), a sleeve (3), a supporting plate (4), a water sealing jacket (5), a drill clamp body (6), a limiting plug (7), the drill (8) and a water inlet (9). The supporting plate (4) is fixedly welded to the drill clamp body (6) which is connected with the machine-tool main shaft (2), and the supporting plate (4) is connected with the machine-tool main shaft (2); the water sealing sleeve (5) is matched with the sleeve (3) which is connected with the machine-tool outer shaft sleeve (1) through bolts. The limiting plug (7) is placed inside the drill clamp body (6). By means of the machine tool using the inside water discharging drill, the inside water discharging drill can be applied to an original machine tool (a milling machine) which cannot discharge water from the i