High-load-bearing top-hung window hinge with adjustable opening angle

A high-load-bearing top-hung window hinge with an adjustable opening angle comprises a long support, a middle support, a short support, a pull rod and a C-shaped bottom groove which are hinged to one another, a first sliding block assembly is arranged at the head end of the C-shaped bottom groove, and one end of the middle support and one end of the short support are hinged to the first sliding block assembly; one end of the first reinforcing rod is hinged to the pull rod, the other end of the first reinforcing rod is hinged to the middle support, one end of the second reinforcing rod is hinged to the long support, and the other end of the second reinforcing rod is hinged to a second sliding block assembly arranged at the tail end of the C-shaped bottom groove. An angle adjusting piece is arranged between the first sliding block assembly and the second sliding block assembly in a locking and sliding mode. The first reinforcing rod and the second reinforcing rod are additionally arranged, so that the pressure