The invention provides a dual-metallic spherical crown substrate, a manufacturing method thereof and a spherical steel support applying the dual-metallic spherical crown substrate, and relates to the technical field of bridges and buildings. The manufacturing method comprises the following steps of manufacturing the spherical crown substrate, wherein the spherical crown substrate is made from carbon steel or cast iron; forming an alloy spherical crown, wherein the alloy spherical crown is composited and cast on the surface of the spherical crown substrate, and the surface of one side of the alloy spherical crown is a convex spherical surface. The dual-metallic spherical crown substrate formed through the manufacturing method has the good wear resistance, corrosion resistance and a small friction coefficient, the layer structures are tightly combined, and the problem of internal hollowing does not exist.