The present invention relates to a dual-alloy steel hoe blade structure of agricultural hand tool and a manufacture method thereof. During digging period, hitting a rigid substance such as stone can cause damage or bluntness to a conventional hoe blade that is made of full stainless steel, thereby this invention is designed for solving said problem. The hoe blade of this invention mainly includes a welding part formed by assembling an iron section and a steel section. After the iron section was welded on the top face of the welding part, an iron welding rod is welded on the bottom face. By using red-hot temperature to perform hot-melting, forging and tamping, the hot-melted iron welding rod can wrap the steel section from the bottom face to the blade edge to form a hoe blade with dual-alloy steel. Thereby, the bottom face of steel section of the hoe blade has anti-cracking performance of iron, and the top face has the rigidity of steel.
