The present invention relates to the field of mechanical experimental technology, and in particular to a dynamic vibration reduction experimental device and experimental method, comprising: a fixed base, a vibration main system, a vibration sub-system and a vibration testing system; the vibration main system comprises: an elastic beam and a rotating motor mass block; the two ends of the elastic beam are respectively articulated on the first support plate and the second support plate; the rotating motor mass block is arranged on the elastic beam; the vibration sub-system comprises: a spring, a porous aluminum sheet and an electromagnet; the upper end of the spring is fixedly connected to the rotating motor mass block, the lower end of the spring is fixedly connected to the porous aluminum sheet, the electromagnet is arranged on the bracket, and is used to generate a magnetic field around the porous aluminum sheet; the vibration testing system is respectively connected to the rotating motor mass block and the porous aluminum sheet, and is used to test the vibration signals of the vibration main system and the vibration sub-system.

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