Abstract: In marine engineering environment, the wind is one of the main loads. At present, the physical model tests for the ocean engineering usually adopt the uniform wind to simulate equivalent wind load. But the natural wind is uneven and has a strong random pulsation. Under the condition of uniform and uneven wind, the vessel load has large difference between them. Before studying the force and motion of ship in the randomly fluctuating wind field, it is necessary to establish a random wind test environment. Thus, grasping the law of simulating the wind field is the first step and has more practical meaning. In this study, a programmable servo driver is used for controlling the response time of the wind machine. Based on the features of the random wind spectrum, some physical wind model tests have been carried out in the laboratory. Compared with other model tests, the results of the present experiment show better. Meanwhile, studies of the different effects of the main control factors of spectrum simulation have been done to provide the necessary data for determining suitable parameters in the tests, such as signal interval time and testing time, and to further offer random wind experiment environment for researches of dynamic water transport engineering.