Dome A, on the Antarctica plateau, offers a new window for uninterrupted and consecutive observations of variable targets. CSTAR deployed at Dome A had been operated for four consecutive years since 2008 and collected vast mass of frames. For each polar winter, the observational time can span over 100 days which means to cover hundreds of periods of most eclipsing binary stars. We represent here the first result of four eclipsing binary stars, CSTAR 36162, CSTAR 38663, CSTAR 55495 and CSTAR 57775, using the data of CSTAR 2008 in i and 2009 in g and r bands. The further works are in progress, including fundamental parameters of those targets using the WD's code and investigation of period change from O − C diagrams.