  AST3-1 is the second-generation wide-field optical photometric telescope
dedicated to time domain astronomy at Dome A, Antarctica. Here we present the
results of $i$ band images survey from AST3-1 towards one Galactic disk field.
Based on time-series photometry of 92,583 stars, 560 variable stars were
detected with $i$ magnitude $\leq$ 16.5 mag during eight days of observations;
339 of these are previously unknown variables. We tentatively classify the 560
variables as 285 eclipsing binaries (EW, EB, EA), 27 pulsating variable stars
($\delta$~Scuti, $\gamma$~Doradus, $\delta$~Cephei variable and RR Lyrae stars)
and 248 other types of variables (unclassified periodic, multi-periodic and
aperiodic variable stars). Among the eclipsing binaries, 34 show O'Connell
effects. One of the aperiodic variables shows a plateau light curve and another
one shows a secondary maximum after peak brightness. We also detected a complex
binary system with RS CVn-like light curve morphology; this object is being
followed-up spectroscopically using the Gemini South telescope.
