The utility model discloses a prefabricated installation structure for a special-shaped sculpture modelling hung ceiling. The structure comprises an expansion screw (1), a threaded derrick (2), a clamping piece (4), a main keel (5), an auxiliary keel (6) and a plate substrate (8), wherein the expansion screw (1) is fixed on the top surface; the upper end of the threaded derrick (2) is connected to the expansion screw (1), and the lower end of the threaded derrick (2) is connected to a large hanger (3); the main keel (5) and the large hanger (3) are fixed in a adjustable manner; the auxiliary keel (6) is fixed in the main keel (5) through the clamping piece (4); a perforated structure hanger (7) is arranged below the auxiliary keel (6); grooves are formed in the two side ends of the plate substrate (8); the plate substrate (8) is fixed on the perforated structure hanger (7) through a groove hole; the lower layer of the plate substrate (8) is connected with a sculpture modeling surface course (9). According to the prefabricated installation structure for the special-shaped sculpture modelling hung ceiling, the construction is simple, the stability of installation is improved, and the common problems of obvious splicing gaps, long construction period, inconvenience in assembly, easy deformation after installation and the like are solved.