The invention relates to a temperature regulator for a heat exchange loop. The temperature regulator comprises a valve body and a thermal motive power element, wherein the cavity body is provided with a cavity, the thermal motive power element is arranged in the cavity in a matched way, the valve body also comprises two through holes which are respectively communicated with the cavity, the two through holes are respectively a first hole and a second hole, the first ends of the second hole and the first hole are respectively communicated with an inlet and an outlet of an external fluid cooling device, the second ends of the second hole and the first hole are respectively a fluid inlet and a fluid outlet, the inner diameter of the cavity is greater than the inner diameter of the second hole, in addition, the cavity is communicated with the second hole, one end, near the second hole, of the cavity is partially coincident with the second hole, the outer peripheral side of the thermal motive power element is sheathed with an elastic component, one end of the elastic component is tightly pressed, butted and connected onto the thermal motive power element, and the other end of the elastic component and the bottom of the cavity are tightly pressed, butted and connected with a shoulder part formed by the second hole. The temperature regulator for the heat exchange loop has the advantages that the work temperature of lubricating oil is controlled in an effective range, and the lubricating performance of the lubricating oil can be enabled to be maintained in the optimum state.