A kind of milling fixture for the machining of thin-walled frame parts was designed, in which vacuum absorption was used to clamp parts and group movable blocks were adapted to process thin-wall frame type parts with various shape cavities. The pro- cessing problem of the parts with different symmetrical cavities was solved by movable block with air holes. The cam locking lever was used for rapid positioning, clamping and unloading. In the whole process of the clamping, the parts didn't have big deformation. Practice has proved that using the ...