Advanced high strength zinc plated steel sheet having excellent surface quality and electrical resistance spot weldability and manufacturing method thereof

A method for manufacturing a galvanized steel sheet, the method comprising:

• heating a steel slab to a temperature of 950 to 1,350° C.;
• hot-rolling the steel slab under conditions of a finishing rolling start temperature of 900 to 1,150° C. and a finishing rolling end temperature of 850 to 1,050° C. to obtain a hot-rolled steel sheet;
• coiling the hot-rolled steel sheet at a temperature of 590 to 750° C.;
• pickling the hot-rolled steel sheet at a sheet-passing speed of 180 to 250 mpm;
• cold-rolling the hot-rolled steel sheet at a reduction ratio of 35 to 60% to obtain a cold-rolled steel sheet;
• performing recrystallization annealing on the cold-rolled steel sheet in an atmosphere of a dew point of −10 to 30° C. at 650 to 900° C.;
• and
• hot-dip galvanizing the annealed cold-rolled steel sheet.