The invention provides a hollow static blade leading and trailing edge milling clamp device for a four-axis rotary machine tool. By the device, the problems of unstable blade compaction, insufficient rigidity and multiple blade surface vibrating lines in a milling clamp device for a three-axis fixed machine tool can be solved. The device comprises a base plate and a profile positioning block, wherein the profile positioning block is fixed on the base plate. The device is characterized by also comprising a profile compacting block, wherein profiles of the profile positioning block and the profile compacting block are matched with those of an inner arc plate and a back arc plate of a hollow static blade to be machined; the profile compacting block is fixed on a compacting beam; two ends of the compacting beam are arranged on the base plate by pressing plate supports; and two ends of the base plate is fixed on the four-axis rotary machine tool by rotary discs of the four-axis rotary machine tool.