According to the advantages of the eddy current displacement sensor, such as high frequency response and high reliability, it was proposed to combine the eddy current displacement sensor with the tooling. Its effects in the tests of compressor crankshaft running angle, rotor system axial vibration and valve lift were analyzed. The results show that the eddy current sensor can meet the requirements of the complex and harsh working environment inside the compressor, and the comprehensive detection of displacement in each position can be realized. It is suitable for the measurement of mechanical movement characteristics inside the compressor.