Abstract: For an unmanned helicopter optoelectronic system, the external passive vibration isolation platform was designed and verified based on the Hexapod configuration. The dynamic model of the vibration isolation platform was established, and the parametric modeling of the platform was completed. The theoretical analysis and simulation comparison of the digital prototype were carried out based on Adams and Simulink co-simulation to verify the accuracy of the modeling. Carry out the engineering prototype development, complete the engineering prototype sweep frequency test and coupling response test. The results show that the natural frequency of the three-direction linear excitation of the isolation platform is less than 8 Hz, which can realize the vibration attenuation of the main vibration frequency of the helicopter platform, and the coupling angle swing response RMS valve is less than 200 urad. Finally, the test was completed, and the prototype of the vibration isolation platform met the operational requirements.