The invention relates to an impact test platform, a test device and a hoisting buffer test method. The test platform comprises a base, a concrete platform and impact force sensors; the base comprisesa box girder, I-shaped beams, a panel and end plates; the concrete platform is arranged below the base; and the impact force sensors are arranged at the bottom and side part of the base and are tightly attached to the concrete platform. The test device comprises the test platform and a loading component arranged above the test platform. When a hoisting buffering test is to be carried out, the loading component is arranged on the test platform; and the lowering gear and transverse amplitude of a floating crane are controlled, different buffering cushion materials are compared with each other, and therefore, the hoisting buffering test can be carried out. With the impact test platform, the test device and the hoisting buffer test method of the invention adopted, the conditions of impact forces in a vertical direction and a horizontal direction can be tested at the same time; the upper loading component performs impact at different angles, which conforms to actual working conditions; thebuffering performance of various buffering materials under different sea conditions and different lowering speeds can be tested; and a basis can be provided for the feasibility of offshore hoisting operation under various conditions.