Plated steel sheet having excellent strength, formability and surface quality, and manufacturing method therefor

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

• performing continuous casting on steel containing, by wt %, 0.003 to 0.009% of C, 0.05% or less of Si, 0.4 to 1.0% of Mn, 0.04 to 0.09% of P, 0.01% or less of S, 0.005% or less of N, 0.1% or less of S.Al, 0.03 to 0.08% of Mo, 0.005 to 0.03% of Ti, 0.02 to 0.045% of Nb, 0.06 to 0.15% of Cu, 0.003% or less of B, and a balance of Fe and unavoidable impurities;
• reheating a slab obtained by the continuous casting;
• providing a hot-rolled steel sheet by hot rolling the reheated slab;
• coiling the hot-rolled steel sheet;
• providing a cold-rolled steel sheet by cold rolling the hot-rolled steel sheet;
• annealing the cold-rolled steel sheet;
• and
• hot-dip galvanizing the annealed cold-rolled steel sheet by immersing the annealed cold-rolled steel sheet in a zinc-based plating bath,
• wherein the continuous casting satisfies the following Relational Expression 3:
• 1≤Vc≤5−[P]/[Mo] [Relational Expression 3]
• (in Relational Expression 2, Vc represents an average casting velocity during the continuous casting and a unit thereof is m/min, [P] represents an average content wt % of P in the slab, and [Mo] represents an average content wt % of Mo in the slab).