Disclosed is a method for producing a coated steel sheet. A method for producing a coated steel sheet according to the present invention includes the steps of: reheating a steel slab containing 0.15-0.25 wt% of carbon (C), more than 0 wt% but not more than 1.5 wt% of silicon (Si), 1.5-2.5 wt% of manganese (Mn), more than 0 wt% but not more than 1.8 wt% of aluminum (Al), 0.3-1.0 wt% of chromium (Cr), more than 0 wt% but not more than 0.03 wt% of titanium (Ti), more than 0 wt% but not more than 0.03 wt% of niobium (Nb), and the balance of iron (Fe) and unavoidable impurities; hot-rolling, cooling and coiling the steel slab, thereby producing a hot-rolled steel sheet; pickling the hot-rolled steel sheet, followed by cold rolling; annealing the cold-rolled steel sheet at a temperature between 820°C and 870°C, followed by cooling at a finish-cooling temperature between 350°C and 450°C; tempering the cooled steel sheet at a temperature between 450°C and 550°C; and hot-dip galvanizing the tempered steel sheet.