The invention provides a Dsp Builder based satellite flywheel simulator achievement method and relates to the field of satellite testing. The Dsp Builder based satellite flywheel simulator achievement method aims at solving the problem that a traditional satellite flywheel model calculating method is not high in calculating accuracy and low in calculating speed. The Dsp Builder based satellite flywheel simulator achievement method comprises the following steps that 1, a graphical modeling method is adopted to establish a flywheel Runge-Kutta mdl file model in a Simulink environment, and flywheel Runge-Kutta modeling and simulation are performed; 2, the flywheel Runge-Kutta model established in the Simulink environment and provided with the suffix of mdl is converted into a common hardware description language VHDL file; 3, a top-layer module is compiled in a QuartusII environment by using verilog language, input/output ports are allocated, and a converted VHDL hardware module is called to achieve calculation of the flywheel Runge-Kutta model. The Dsp Builder based satellite flywheel simulator achievement method is suitable for the field of satellite testing.