Dynamic vibration absorber and test system

The utility model provides a dynamic vibration absorber and a test system, and the dynamic vibration absorber comprises an air spring which is provided with an air storage space; the mass block is fixedly arranged on the periphery of the air spring in a sleeving manner and is driven by the air spring to vibrate; and the air pressure value in the air storage space can be adjusted, so that the frequency of the dynamic vibration absorber is adjusted by changing the rigidity of the air spring. In this way, by adjusting the air pressure value in the air storage space of the air spring, the frequency of the dynamic vibration absorber can be adjusted, the specific frequency of the dynamic vibration absorber can be reliably maintained, the frequency of the dynamic vibration absorber can be accurately adjusted, and when the frequency of a debugging sample piece is not equal to the frequency of a defective part, the frequency of the debugging sample piece can be accurately adjusted. Only the frequency of the debugging