The utility model discloses a long-service-life gantry frame for ships. The long-service-life gantry frame comprises a triangular piece body, a pulley block and a connecting hole, wherein the connecting hole is formed in the bottom of the longest side of the triangular piece body and is externally connected with a ship; the pulley block is arranged at the bottom of the longest side of the triangular piece body and is externally connected with a steep wire rope of a wrench; a hydraulic jack sliding groove is formed in the triangular piece body. When the external gantry frame is in a vertical state, an angle of minus 40 degrees to 70 degrees is formed between the hydraulic jack sliding groove and a horizontal plane. The long-service-life gantry frame is compact in structure, low in manufacturing cost, large in bearing force and long in service life; when the hydraulic jack sliding groove cooperates with a hydraulic jack, the triangular piece body has a certain moving space, the impact force caused by non-uniform stress to the hydraulic jack is weakened, and a function of protecting the hydraulic jack and the gantry frame is achieved.