Plated steel sheet for hot press forming having excellent impact properties after hot press forming, hot press formed member, and manufacturing methods thereof

A plated steel sheet for hot press forming, the plated steel sheet comprising:

• a base steel sheet including, by wt %, 0.15% to 0.4% of carbon (C), 0.1% to 1% of silicon (Si), 0.6% to 8% of manganese (Mn), 0.001% to 0.05% of phosphorus (P), 0.0001% to 0.02% of sulfur(S), 0.01% to 0.1% of aluminum (Al), 0.001% to 0.02% of nitrogen (N), 0.01% to 0.5% of chromium (Cr), a balance of Fe, and other impurities;
• and
• a plating layer including zinc, aluminum, or alloys thereof on a surface of the base steel sheet,
• wherein a ratio (Cs/CB) of a C content (Cs) of a surface layer portion to a C content (CB) of the base steel sheet is 0.6 or less, and a ratio ((Mns+Crs)/(MnB+CrB)) of a sum (Mns+Crs) of contents of Mn and Cr of the surface layer portion to a sum (MnB+CrB) of contents of Mn and Cr of the base steel sheet is 0.8 or more,
• wherein the surface layer portion refers to a region to a depth of 15 μm from the surface of the base steel sheet excluding the plating layer.