A ultra high strength hot-rolled steel sheet having excellent ductility, comprising: 0.15% to 0.25% carbon, 0.6% to 2.0% silicon (Si), 1.5% to 3.0% manganese (Mn), 0.01% to 0.1% aluminum (Al), 0.01% to 0.5% chrome (Cr), 0.005% to 0.2% molybdenum (Mo), 0.001% to 0.05% phosphorus, 0.001% to 0.05% sulfur, 0.001% to 0.01% nitrogen, 0.003% to 0.1% niobium (Nb), 0.003% to 0.1% titanium (Ti), 0.003% to 0.1% vanadium, 0.0005% to 0.005% boron, a balance of iron (Fe) and unavoidable impurities, by weight percentage, and satisfying following relational expressions 1 and 2: 4.5 ≤ Mn + 12 sol. C + 2.5 Mo + 2 Cr + 300 B + V ≤ 5.3 sol. C = C − 0.25 Ti + 0.13 Nb + 0.125 Mo, 0.17 ≤ sol. C ≤ 0.22, wherein sol.C refers to the solid solution carbon and a content of each element symbol represents a content in % by weight of the element in Relational Expression 1 and Relational Expression 2, and wherein a microstructure of the hot-rolled steel sheet includes 85% or more martensite, 3% to 15% retained austenite, and other unavoidable phases, by area fraction, and wherein the unavoidable phases include ferrite and bainite, and a sum of the ferrite and bainite is lower than 5% by area fraction, and wherein the hot-rolled steel sheet has a tensile strength of 1200 MPa or greater, and an elongation rate of 10% or greater, and the tensile strength was measured according to the method given in the description. 0.15% to 0.25% carbon, 0.6% to 2.0% silicon (Si), 1.5% to 3.0% manganese (Mn), 0.01% to 0.1% aluminum (Al), 0.01% to 0.5% chrome (Cr), 0.005% to 0.2% molybdenum (Mo), 0.001% to 0.05% phosphorus, 0.001% to 0.05% sulfur, 0.001% to 0.01% nitrogen, 0.003% to 0.1% niobium (Nb), 0.003% to 0.1% titanium (Ti), 0.003% to 0.1% vanadium, 0.0005% to 0.005% boron, a balance of iron (Fe) and unavoidable impurities, by weight percentage, and satisfying following relational expressions 1 and 2: 4.5 ≤ Mn + 12 sol. C + 2.5 Mo + 2 Cr + 300 B + V ≤ 5.3 sol. C = C − 0.25 Ti + 0.13 Nb + 0.125 Mo, 0.17 ≤ sol. C ≤ 0.22, wherein sol.C refers to the solid solution carbon and a content of each element symbol represents a content in % by weight of the element in Relational Expression 1 and Relational Expression 2, and wherein a microstructure of the hot-rolled steel sheet includes 85% or more martensite, 3% to 15% retained austenite, and other unavoidable phases, by area fraction, and wherein the unavoidable phases include ferrite and bainite, and a sum of the ferrite and bainite is lower than 5% by area fraction, and wherein the hot-rolled steel sheet has a tensile strength of 1200 MPa or greater, and an elongation rate of 10% or greater, and the tensile strength was measured according to the method given in the description. wherein sol.C refers to the solid solution carbon and a content of each element symbol represents a content in % by weight of the element in Relational Expression 1 and Relational Expression 2, and wherein a microstructure of the hot-rolled steel sheet includes 85% or more martensite, 3% to 15% retained austenite, and other unavoidable phases, by area fraction, and wherein the unavoidable phases include ferrite and bainite, and a sum of the ferrite and bainite is lower than 5% by area fraction, and wherein the hot-rolled steel sheet has a tensile strength of 1200 MPa or greater, and an elongation rate of 10% or greater, and the tensile strength was measured according to the method given in the description.