The invention discloses a gas shield solid welding wire for circumferential weld of X90 pipeline steel, and belongs to the technical field of welding materials. The gas shield solid welding wire is applicable to all-position welding on the circumferential weld of X90 pipeline steel for high-pressure oil and gas delivery pipelines. The gas shield solid welding wire comprises, by weight, 0.05-0.11% of C, 0.50-0.80% of Si, 1.40-1.80% of Mn, lower than 0.010% of P, lower than 0.010% of S, 0.30-0.50% of Cr, 0.05-0.10% of Ti, 0.30-0.60% of Mo, 1.5-2.0% of Ni, 0.003-0.008% of B and the balance Fe. The gas shield solid welding wire has the advantages that the gas shield solid welding wire is used for carrying out all-position welding on the circumferential weld of X90 pipeline steel, and the tensile strength sigma of weld seam metal is higher than or equal to 720Mpa; impact energy A of the weld seam metal at the temperature of minus 10 DEG C is higher than or equal to 130J, and the welding wire is excellent in welding technological efficiency.