The invention discloses a circuit for conditioning a thermal resistance temperature signal, which is used for conditioning a signal input by a lubricating oil temperature sensor into a signal that canbe acquired by a CPU board assembly. The circuit comprises an excitation signal circuit and a signal amplifying circuit. The excitation signal circuit is respectively connected with the lubricating oil temperature sensor and the signal amplifying circuit, and is used for providing an excitation signal to the lubricating oil temperature sensor. The signal amplifying circuit is used for amplifyinga signal output by the excitation signal circuit and transmitting to the CPU board assembly. The circuit for conditioning the thermal resistance temperature signal and an electronic controller providethe excitation signal to the lubricating oil temperature sensor by using the excitation signal circuit, and then amplify the signal output by the excitation signal circuit by using the signal amplifying circuit and transmit to the CPU board assembly, so that the circuit integration is high, the circuit structure is simple, and at the same time, the functions of signal excitation and signal conditioning are taken into consideration.