Abstract: The solar array output power will be decreased, which will lead to its failure, when the lunar dust is accumulated on the surface of the solar array. In recent years, the electric curtain dust removal method is considered as an effective way for the lunar dust protection. In this paper, the performance of the triple-junction gallium arsenide solar cell is analyzed through experiments of the lunar dust accumulation on the solar cell, and a trend exponential fitting function between the relative output power and the dust deposition mass is obtained. Furthermore, the dust removal efficiency of the electric curtain for different amounts of lunar dust accumulation mass is studied. The results show that the optimum operating point of the electric curtain dust removal device is 6 mg/cm². The research provides a technical support for the solar array with adaptive dust removal capacity.