This paper presents the working principle, design process, and simulation analysis of a tube permanent magnet linear generator used in bladeless wind turbine system are introduced. In order to improve the performance of the motor during the design process, 120° phase belt toroidal winding and quasi-Halbach permanent magnet structure are used. Firstly, the structure and working principle of TPMLG are described. Then, the parametric design process of converting the rotary machine into a cylindrical linear motor is introduced, and the structural parameters of the motor with the power of 100 W and the rated voltage of 24 V are obtained. Finally, the finite element method is used to simulate and analyze the no-load and load conditions of the generator, and the relationship between the power and efficiency of the generator and the external load is obtained. The research results verify the correctness of the design and analysis, and provide a research basis for the subsequent research and development of bladeless wind turbine systems.