Fuse resistor and manufacturing method thereof

A fuse resistor includes a substrate, an insulating layer, a fuse element, a protective layer, a first electrode, and a second electrode. The insulating layer covers the surface of the substrate. The fuse element is disposed on a portion of the insulating layer. The fuse element comprises a first electrode part, a fusing part and a second electrode part, and the first electrode part and the second electrode part are respectively connected with two opposite ends of the fusing part. The protective layer covers the fuse element and the insulating layer, wherein the protective layer has a groove on the fusing portion. The first electrode is electrically connected with the first electrode part. The second electrode is electrically connected with the second electrode part. As the protective layer covering the fuse element is provided with the groove which is positioned on the fusing part of the fuse element, the fusing of the fusing part can be accelerated, and other electronic elements on the circuit board can be