With the rapid development of offshore floating wind power, the vertical axis wind turbine[VAWT] has a simple structure and a low center of gravity, which has more potential for development in the field of far-reaching sea cage self-power supply. The structure of VAWT is far different from that of horizontal axis wind turbine[HAWT), and the interaction law of each unit of wind farm array is not clear, so the experience of horizontal axis turbine array engineering is difficult to be directly applied. In this paper, for H-type vertical axis wind turbine, through CFD simulation, the airfoil design is associated with turbine array, and the torque coefficient CM, power coefficient CP and average power parameter Ω of vertical axis turbine under various airfoils and different array conditions are compared and analyzed. The power coefficient of asymmetric airfoil is lower than that of symmetrical airfoil at high tip speed ratio, and the bending effect can significantly improve the power coefficient of the airfoil in downwind region. In the wind farm array, after the optimization of the three-turbine array, the turbine power in the downwind zone can be significantly increased, the single turbine power can be increased by 40%, and the overall wind farm power can be increased by about 20%. Five turbine arrays are proposed for the structural plane of the sea pasture. After the optimization, the overall efficiency of the wind farm can be increased by 65%, and the performance of the single turbine can be improved by 100%. The above research results have promoting significance for improving the function and design of far-reaching Marine cage system.