The invention provides economical high-toughness 800MPa-level automobile beam steel. The economical high-toughness 800MPa-level automobile beam steel is prepared from the following components in percentage by weight: 0.07-0.11% of C, 1.55-1.80% of Mn, 0.05-0.20% of Si, less than or equal to 0.015% of P, less than or equal to 0.008% of S, 0.020-0.040% of Nb, 0.10-0.20% of Mo, 0.03-0.06% of Al, 0.09-0.13% of Ti, less than or equal to 0.005% of N, and the balance of Fe and inevitable impurities. The invention further provides a production method for the economical high-toughness 800MPa-level automobile beam steel, and the production method comprises the following steps: a top and bottom re-blowing converter process, LF refining, slag continuous casting, 1780mm mill rolling, and front-sectioncooling. The automobile beam steel has high strength, high toughness and low production cost. While used as an automobile structure part, the automobile beam steel can avoid occurrence of a cracking phenomenon in use in processes such as shearing, stamping, bending and welding.