The invention discloses a steel wire rod for a bainite high-strength welding wire and a production method thereof. The steel wire rod for the bainite high-strength welding wire comprises the followingchemical components of, in percentage by mass, 0.05%-0.11% of C, 0.35%-0.65% of Si, 1.60%-1.80% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.25%-0.37% of Cr, 1.45%-1.85% of Ni, 0.42%-0.52% of Mo, 0.13%-0.16% of Ti, and the balance Fe and unavoidable impurities. The mechanical property of the steel wire rod for welding wire meets the conditions that the tensile strength is larger than or equal to 900 MPa, the elongation is larger than or equal to 25%, the cross-section shrinkage rate is larger than or equal to 70%, and the steel wire rod can be applied to thefield of high-strength steel welding of coal mine machinery, containers, buildings, ships, bridges and the like.