For a vehicle suspension shock absorber abnormal noise problem, the vehicle road test and rig test has been carried on, which result in the consistency rule: shock absorber piston rod acceleration signal within the specific frequency band has similarity. So the part of road test can be replaced by a series of rig tests for shock absorber abnormal noise identification. Then research on the rig test for identifying abnormal noise of shock absorber puts forward The Time Difference Method, The Subsection Auto-power RMS Value Method and The Characteristic Energy of Wavelet Analysis Method and compare their advantages and disadvantages. Depends on that, the Clustering Analysis Method Based On Weight Coefficient has been proposed and adopted, which transfer rigid rectangular single index into a more flexible circular determine areas and reduce the final misjudgment probability caused by single index. This method can provide the reference for the mass, different types of absorber abnormal noise identification and improve the judgment accuracy.