The invention discloses a fuse element of a photovoltaic fuse. The fuse element comprises a fuse element body. The fuse element body is an elongated platy metal sheet, and a plurality of breaking portions which are used for being broken when currents are excessively high are sequentially arranged on the fuse element body. The fuse element of the photovoltaic fuse has the advantages that the fuse element body is the elongated metal sheet, the breaking portions are arranged on the fuse element body, and accordingly the breaking safety performance of the fuse can be effectively improved; improvement on materials of the fuse element body is omitted, so that the production cost of the fuse can be effectively reduced.