Solid-cored welding wire capable of improving fatigue performance of high-strength steel welding joint of engineering machinery

The present invention relates to an improved solid wire fatigue properties of a construction machine of high strength steel welded joint. The technical scheme is: the solid wire chemical composition is: C is 0, Mn of 1.50 ~ 2.00wt%, Si of 0.40 ~ 0.80wt%, Cr of 12.00 ~ 20.00wt%, Ni of 4.00 ~ 8.00wt% , Mo of 0.50 ~ 2.00wt%, P≤0.002wt%, S≤0.005wt%, the balance being Fe and unavoidable impurities. The weld metal using the present invention, the solid wire formed has high strength, high toughness and high wear resistance characteristics, its intensity can be matched with 800 ~ 1000MPa class engineering machinery high strength steel, welded joints having high fatigue resistance to meet the technical requirements of high-strength engineering machinery and equipment of the weld produced and high fatigue properties.