Pre-positioning jig for internally pasting superfine fibers

The utility model relates to the technical field of dies, in particular to a pre-positioning jig for internally pasting superfine fibers. The device comprises a pressing block assembly, a positioning frame and an air suction supporting seat, the air suction supporting seat is provided with an air suction connector externally connected with air suction equipment and a profiling groove matched with a shell to be machined in shape, the profiling groove is communicated with the air suction connector, the positioning frame is provided with a positioning groove, the positioning groove is located above the profiling groove, and the superfine fiber assembly and the shell are sequentially placed in the positioning groove. The pressing block assembly is arranged above the positioning groove. During pressing, air is sucked in the air suction supporting base, and meanwhile the pressing block assembly downwards presses the shell and the superfine fiber assembly into the profiling groove. Through the structural design of t