Method for manufacturing large and thick rare precious metal explosion-clad steel plate

The invention relates to a method for manufacturing a large and thick rare precious metal explosion-clad steel plate. The method comprises the following steps of: explosively welding a thin cladding plate with a small area and the thickness of 2 mm to the central zone of a substrate by adopting an opposite-angle detonation manner before explosively welding a cladding plate; and explosively welding the large and thick rare precious metal cladding plate through a strong detonation device by adopting a center detonation manner. The method provided by the invention has the advantages that a rare precious metal and steel clad material with a large area and a thick clad layer can be obtained, the tearing of the periphery of large and thick rare precious metal after explosive welding can be controlled through center detonation, high-cost high explosive can be replaced while the area of an unclad zone of a detonation point is reduced, and the problem that an unclad zone of a center detonation point cannot be subjecte