The invention discloses a high-tin-content silver welding rod and a manufacturing method thereof and belongs to the technical field of silver solder and processing thereof. The high-tin-content silver welding rod is mainly composed of an inner core and a solder layer coating the surface of the inner core, and the inner core is made of silver solder low in tin content, so that processability of a welding wire can be guaranteed; the solder layer is made of the silver solder high in tin content, so that tin content of the welding rod can be increased integrally, brazing temperature can be lowered, and production cost is saved. The silver solder low in tin content and the silver solder high in tin content are mixed according to a certain proportion, so that chemical ingredients of the welding rod meet requirements in a table 2 of national standards GB/T 10046-2008 as a whole. The manufacturing method is simple and simple and convenient to operate, and solder difficult to process can be quickly processed into needed size.