Abstract: An electronic device with protected corners includes a main device body and a plurality of composite corner-pad structures. The main device body having an operation surface and an opposite back surface further includes a plurality of lateral sides, and two adjacent lateral sides are connected via a corner portion so as to make the main device body having a plurality of corner portions. Each the corner portion has a first corner-portion surface on the operation surface and a second corner-portion surface on the back surface. The plurality of composite corner-pad structures are individually and detachably mounted fixedly on the corresponding corner portions. Each of composite corner-pad structures includes a first corner pad and a second corner pad. The first corner pad covers at least part of the first corner-portion surface, and the second corner pad assembled to the first corner pad covers at least part of the second corner-portion surface.