A large-tonnage single-pile pull-out test system comprises two supporting piers, two main steel beams, multiple jacks, an anchoring disk, an anchoring pull assembly and a tested single pile. The two supporting piers are symmetrical about the center of the tested single pile. The two ends of the two main steel beams are placed at the upper ends of the two supporting piers. The two main steel beams are transversely arranged relative to the supporting piers. Each main steel beam bears at least two jacks. The jacks are symmetrically arranged with the center of the tested single pile as the axis. The multiple jacks support the anchoring disk. Multiple anchoring holes are arranged in an annular array with the center of the anchoring disk as the basis. The anchoring holes penetrate through the anchoring disk from top to bottom. A restraining steel plate is provided with restraining holes. The restraining steel plate is placed above the anchoring holes. The restraining holes are stacked above the anchoring holes. Connection steel reinforcing bars penetrate through the restraining holes. Restraining steel reinforcing bars on the two sides of the connection steel reinforcing bars are clamped to the restraining holes. The large-tonnage single-pile pull-out test system aims to achieve an accurate test result.