Clamp device for automobile skylight machining

The invention discloses a clamp device for automobile skylight machining. The clamp device comprises a base, a workbench and a clamping rack, supporting guide columns are fixedly installed on the periphery of the upper end of the base, the top ends of the supporting guide columns are fixedly connected with the lower end face of the workbench, and a downward pressing air cylinder is further fixedly installed in the center of the lower end face of the workbench; the telescopic end of the downward pressing air cylinder is connected with a mounting base, a pair of clamping racks distributed in the left-right direction is fixedly mounted on the mounting base, clamping plates are fixedly connected to the upper ends of the clamping racks, and pressing block assemblies used for clamping a skylight frame are mounted at the lower ends of the clamping plates. A station groove is formed in the workbench; and bottom pedestals used for being matched with the pressing block assemblies are fixedly installed at the left end a