The invention relates to the field of
welding production, in particular to a
butt welding method for a
bimetal composite plate, which does not use a middle
transition layer for
welding, avoids adverse effects caused by contact and mixing of elements in a matrix layer and a composite layer through a melt by arranging a weld groove, selecting a
welding method and optimizing a process, and therefore the
mechanical property and the
corrosion resistance of a
welding joint are ensured. The
butt welding method comprises the following steps of a, preparing materials, specifically, forming a base body layer truncated
edge structure and a base body layer groove structure; B, cleaning weld joints and surfaces near the weld joints; C, assembling, specifically, enabling two plates to be in
butt joint, and fixing the
bimetal composite plates through a tool clamp; and d, welding, firstly, welding a composite layer welding seam by adopting a
laser welding method, then, welding the part of the truncated
edge structure of the base body layer by adopting
electric arc welding, and finally, finishing the remaining welding bead of the welding seam needing to be welded by adopting an
electric arc welding or
laser composite welding method. The
butt welding method is particularly suitable for the butt
welding process of the
bimetal composite plate.