Integral type diamond pre-milling cutter clamping fixture

The utility model discloses an integral type diamond pre-milling cutter clamping fixture which comprises a fixed seat (1) fixedly arranged on a machine table, a first rotating unit (2) is fixedly arranged on the left end face of the fixed seat (1), an output shaft of the first rotating unit (2) penetrates through the fixed seat (1), a mounting plate (3) is fixedly arranged at the extending end of the first rotating unit (2), and a second rotating unit (4) is fixedly arranged at the bottom of the mounting plate (3). Two ports of the U-shaped channel (10) are communicated with the two radial grooves (7) respectively, a threaded hole A (11) communicated with the U-shaped channel (10) is formed in the side wall of the base (5), and a screw (12) is connected into the threaded hole A (11) in a threaded mode. The device has the beneficial effects that the structure is compact, the integral diamond pre-milling cutter is prevented from falling off in the rotating process, the integral diamond pre-milling cutter is pre