The utility model discloses a PTC power-off reset temperature controller. Including a body, guide frame is arranged on the body, a sealing cover is arranged at the top of the guide frame; a metal discis arranged between the sealing cover and the guide frame; an insulating rod penetrates through the center of the guide frame; the insulating rod is positioned below the metal disc; the metal disc can be selectively touched; a PTC heating body is arranged between the guide frame and the body; a movable contact assembly and a fixed contact assembly are also arranged in the body; the moving contactassembly comprises a moving elastic sheet and a moving contact located at the end part of the moving elastic sheet; the fixed contact assembly comprises a fixed contact, the fixed contact is locatedabove the moving contact and located on the movement stroke of the moving contact, the moving contact assembly is connected with a first elastic piece, the fixed contact assembly is connected with a second elastic piece, and the first elastic piece and the second elastic piece are electrically connected to electrodes of the PTC heating body respectively. The temperature controller can protect an electric appliance, has an automatic reset function, does not need to be disassembled and assembled by professionals, and is convenient to use.