The invention discloses a differential arc point supporting edge turnover formed trough parabolic mirror, which comprises a base and a parabolic arc bracket, wherein the base serves as a bearing piece of the whole device; the parabolic arc bracket is arranged on the base through a frame steel beam; an arc-shaped bearing surface for bearing flat tempered glass mirror is arranged on the bracket; a plurality of supporting pieces with differential parabolic arcs are arranged on the bearing surface; an edge of the glass mirror is provided with a turnover device; the glass mirror is interfered to generate elastic deformation so as to be tightly arranged on the bracket bearing surface through the turnover device and is tightly adhered to the supporting pieces so as to form a perfect trough parabolic arc surface. The trough parabolic mirror has a compact structure, an extremely good condensing effect, high strength, high precision, high reflectivity, low cost and long service life and is easy to clean. In addition, the trough parabolic mirror has a simple machining process, a simple installation method and a highly efficient condensing effect, and can be applied to the fields of solar condensing power generation, heat collecting power generation, high-temperature strong light utilization and the like.