An angle adjustment apparatus for a dish antenna comprises a base, a first rotating frame, a second rotating frame, and a second rotation angle adjustment mechanism. The first rotating frame is fixed to the base, and can relatively rotate around the base with a first rotating angle. The second rotating frame is fixed to the first rotating frame, and can relatively rotate around the first rotating frame with a second rotating angle. The second rotation angle adjustment mechanism comprises a first screw rod, a screw nut post, and a second screw rod. One end of the first screw rod is fixed to the first rotating frame, and the other end is equipped with first threads and engaged with the screw nut post. One end of the second screw rod pivots on the second rotating frame, and the other end is equipped with second threads and engaged with the screw nut post. The first threads and second threads have different screw directions, or have the same screw direction but with different thread pitches.