The high-speed rotor is the key component of the control moment gyroscope (CMG). The efficient test of the rotor drive system holds significant importance for enhancing the control performance and reliability of the CMG. Employing the brushless DC motor emulator (BLDCME) instead of the real motor to conduct the power stage test constitutes an important direction in the advancement of the test technology for the CMG high-speed rotor electrical drive system. In addressing the challenge of the emulation for back electromotive force (back-EMF) within the current implementation schemes of BLDCME, this paper proposes a deadbeat predictive current control (DPCC) method for BLDCME based on the two-level voltage source converter (VSC) topology. Firstly, the BLDCM mathematical model is constructed, and the BLDCME system is analyzed. Secondly, the fundamental principle of the proposed DPCC method is depicted. Finally, simulation analysis is conducted by utilizing the MATLAB/Simulink platform, by which the validity of the proposed DPCC method is corroborated through tests under steady-state and dynamic operating conditions. The simulation results reveal that the proposed DPCC method can effectively emulate the back-EMF of the target motor without the requirement of external linear voltage sources, and possesses outstanding current tracking capability, enabling the BLDCME to achieve almost the same port electrical characteristics as the target motor.