The invention provides a high-hardness automotive connection rod forged through ferrum-based powder in a metallurgical manner. The high-hardness automotive connection rod is manufactured from, by weight, 93-94 parts of iron powder, 2.5-2.8 parts of cuprous iodide, 2-2.3 parts of Ni powder, 0.8-1.1 parts of Mn powder, 0.3-0.4 part of nickel-plated carbon powder, 0.5-0.6 part of boric acid lead, 0.3-0.4 part of zinc stearate, a proper amount of silane coupling agent kh 550, a proper amount of nano tungsten disulfide, a proper amount of polyethylene glycol and a proper amount of deionized water. According to the high-hardness automotive connection rod forged through ferrum-based powder metallurgy and a manufacturing method thereof, the nano-sized tungsten disulfide is used when water-atomized powder is made, the dispersity and lubricating property of the powder are good, the consumption of a lubricant is reduced, the density of a green body is increased, pores in finished products are few, the strength of alloy is improved greatly, the forging pressure and temperature are lowered, and energy is saved; and through the cuprous iodide, the Ni powder, the Mn powder, the nickel-plated carbon powder and the boric acid lead, the abrasive resistance and lubricating property of the connection rod are improved, the surface quality is good, hardness is improved, and the service life is prolonged.