A Kelvin type passive control unit was set up between the simplified models of two-body single-degree-of-freedom of adjacent isolated structures. Based on the Kanai-Tajimi spectral model, by taking the minimum of the total vibration energy of the structures as the optimal control objective, the influence rules of the connection control parameters on the control effect have been drawn on basis of detailed analyses, as well as the optimal control parameters. According to the equivalent two-body single-degree-of-freedom model, the optimal parameters of connection control between adjacent high-rise isolated structures were obtained; Using complex modal theory, the response expressions of adjacent high-rise isolated structures were derived from the time domain and frequency domain; Under different layout schemes the effects of the control device on the seismic response and structural dynamic characteristics of the structures were discussed and analyzed. Finally, it is proved by numerical analysis that, this control method can be applied to adjacent isolated structures, which has good control effect on each structure. It shows the effectiveness and robustness of the proposed control method, which can provide a reference for the study of this kind of structure with compound passive control system.