The invention discloses a single-phase bridge rectifier, relates to the improvement for a single-phase diode bridge rectifier structure, and provides the single-phase bridge rectifier which can improve a heat dissipation effect and relieve labor intensity. The single-phase bridge rectifier comprises a packaging body, a first frame, a second frame, a third frame, a fourth frame and four chips, an acute-angle corner, facing towards the first frame, of the second frame, two acute-angle corners of the third frame and an acute-angle corner, facing towards the first frame, of the fourth frame are respectively bent towards the direction where leads are arranged to form a section difference face which is parallel to each frame body, and N faces of the four chips are respectively welded on the plane of two acute-angle corners of the first frame, the plane of the acute-angle corner, facing toward the third frame, of the second frame, and the plane of the acute-angle corner, facing towards the third frame, of the fourth frame. All the chips are enabled to be arranged in a product in a consistent orientation mode to form a rectification return circuit. Due to the fact that all the large faces (N faces) face a heat dissipation face at the top, the heat dissipation effect of the product is improved. In addition, the single-phase bridge rectifier is placed in a single-surface mode, for an operator, careful discrimination is not needed, and labor intensity of the operator can be greatly relieved.