The invention discloses H-section steel which comprises the following chemical components in percentage by weight: less than or equal to 0.015% of C, 0.20-0.35% of Si, less than or equal to 1.00%, less than or equal to 0.20% of Cu, at least one of Ti, Nb and V, at least one of Cr, Mo, Ni, less than or equal to 0.015% of P, less than or equal to 0.015% of S, and the balance of Fe and inevitable impurity elements. Compared with the prior art, the H-section steel obtained has good yield strength and tensile strength, and is especially suitable for high-rise buildings and super-large structure buildings; dosage of alloying elements used by steel is less, and the production cost is reduced; and the process is simple, the alloy recovery rate is high and the production efficiency is high, so that the H-section steel is suitable for large-scale production.