Hobbing checker

The utility model discloses a milling cutter survey device which comprises a material feeding area and a material discharge area that is positioned at the top of the rack. The material feeding area and the material discharge area can be separated and arranged independently and can be positioned at the knife rest of the milling cutter. A material moving area and a knife moving device are mounted between the material feeding area and the material discharge area which is provided with a survey area and the top part; the material moving area can be loaded with a rotational air cylinder to move back and forth between the material feeding area and the material discharge area, the survey area is provided with a vertical image display and an axial image display, the knife moving device is provided with a material obtaining clamping claw and a material unload clamping claw; so the milling cutter in the material feeding area can be moved to the survey area for inspection by the material clamping claw and the rotational air cylinder and the milling cutter in the survey area can be moved to place in the material discharge area by rotational air cylinder and the unloading clamping claw to realize auto survey of milling cutter.