In order to ensure that safety of the steel platform for aquaculture under adverse sea condition, the wind, wave and running water pool model tests of the platform were conducted to demonstrate the mooring scheme. According to the similarity criterion of model tests, the similarity conditions were adopted where the aquaculture platform is similar to the model geometry, the pool fluid dynamics is similar to the non-constant flow, and the model cable and the actual cable are similar to each other in elasticity. The force-bearing value of each rope, the movement, displacement and direction of the platform model under different force and directions of wind, wave and flow were measured. The results showed that under the working conditions of cross wind, cross wave and cross flow（90°）, the cable bears the largest force, with the maximum value of 114.96 kN, the platform makes the largest amount of motions under the influence of heaving and rolling, with the maximum value of 7.99 m and 12.55° respectively; under the working condition of yaw wind, oblique wave and oblique flow（45°）, the platform makes the largest amount of motions under the influence of pitching with the maximum value of 8.4m; the results show that the wave is higher, the cable force is greater and the ship freedom motion value also larger. Compared with the classification society's guide, the mooring scheme of the breeding platform accords with the guidance requirement of classification society mooring.