The research on control strategy of megawatt-scale wind converter is widely based on digital simulation software such as Matlab/Simulink, PSCAD and Psim, which brings such shortcomings as simulating converter without authenticity and inconvenience of developing and transplanting control algorithm. On account of that, this paper establishes the hardware-in-the-loop simulation platform of 3 MW cage full scale wind converter system on the basis of seamless connection between RT-LAB semi-physical simulator and distributed digital controller, and then the control algorithm for wind power converter is developed and verified. The simulation waveforms and experimental results show that the control strategy proposed by this HIL platform can be applied directly to practical converter system and the effect is completely similar. This method has greatly shortened the development cycle of the wind power converter.