The invention belongs to the technical field of optical
prism processing, and discloses a fixing tool of an optical
prism milling and
grinding machine, the fixing tool comprises a base, the top of the base is slidably provided with a movable frame, the side surface of the movable frame is rotatably provided with a rotating
assembly, and the side surface of the movable frame is fixedly provided with a control
assembly. When bearing downward pressure of a
machining end, the
triangular prism fixed through the two ends is effectively prevented from deviating downwards, the
machining fixing stability is improved, the
machining precision is improved, meanwhile, auxiliary clamping is achieved through the multiple sets of telescopic fixing assemblies and multiple contact lines, the fixing assemblies can be pushed to contract when a
grinding block moves transversely during
grinding treatment, and the machining precision is improved. When the shielding surface during clamping is opened and the shielding surface is automatically opened, surface machining is synchronously completed, stable clamping and fixing are maintained, meanwhile, comprehensive grinding and machining treatment is achieved in cooperation with pushing and extruding of the grinding blocks to the clamping columns, comprehensive grinding is achieved while stability is guaranteed, and the machining and fixing effect is good.