The invention provides an opening rolling machine for a temperature sensor, comprising a base as well as a first power device, a second power device, a clamping device and a limiting device which are all fixedly connected with the base, wherein the first power device is elastically connected with a rolling cylinder; a number of bulges are arranged on the surface of the rolling cylinder; the clamping device comprises a rotary shaft; the rotary shaft is rotationally connected with the second power device; the front end of the rotary shaft is provided with a clamping opening capable of movably clamping the temperature sensor. The opening rolling machine can conveniently carry out opening rolling operation on the temperature sensor through the limiting device, the rolling cylinder and the clamping device, besides, the rolled opening is uniform, and continuous operations are easily realized.