Abstract: As a new type of isolator，series compression rubber isolator was composed of isolated layer rubber and steel plate，which had higher vertical bearing capacity and vertical stiffness but lower horizontal stiffness． Though it was extensively used in vibration isolation of heavy machine with horizontal vibration， the dynamic parameters of the isolator could not yet be obtained by calculation． The calculation method of the dynamic parameters and the design method of the isolator were proposed by reference to current research fruits．