Positioning mechanism for cooling fin machining

The utility model discloses a positioning mechanism for processing a radiating fin, which comprises a processing support structure, a through air exhaust channel is constructed on the processing support structure, the lower part of the air exhaust channel is provided with an access port, and the access port can be connected with a vacuum pump pipeline; an air exhaust cavity is formed in the bottom of the suction cup base structure, a containing part used for containing a cooling fin to be machined is constructed in the middle of the top of the suction cup base structure, and an air exhaust hole communicated with the air exhaust cavity is inwards formed in the containing part; the suction cup base structure is attached to the upper end face of the machining supporting structure in an operable mode, and the air exhaust channel is completely covered with the air exhaust cavity. The positioning mechanism for machining the cooling fins is wide in application range and capable of fixing the cooling fins of various