The invention relates to the field of space special-shaped structure manufacturing, in particular to a space special-shaped component assembling jig frame which comprises a base, a lifting shaft, a lifting rod, a support and positioning seats. The base comprises longitudinal beams, transverse beams and stand columns; the lifting shaft and the corresponding stand columns at the left end of the baseare up-and-down slidably connected; the lifting shaft is fixed onto the corresponding stand columns; the lifting rod and the corresponding stand columns at the right end of the base are up-and-down slidably connected; the lifting rod is fixed onto the corresponding stand columns; the left end of the support is rotatably connected onto the lifting shaft; the right end of the support is erected onthe lifting rod; and the positioning seats are slidably connected with the support and are fixed onto the support. The space special-shaped component assembling jig frame provided by the invention isconvenient to transport and use and has better structure stability, the positioning accuracy of the assembling jig frame can be improved, the component assembling dimension error is reduced, space special-shaped components with larger lengths or bending degrees can be assembled integrally, and the space special-shaped steel structure installation quality and efficiency can be favorably improved.