The multi-block high-temperature superconducting (HTS) maglev system has more complicated dynamic characteristics than the single-block HTS maglev system.To study its vibration characteristics,we designed a maglev measurement system.The system responses at the excitation frequencies of 2,3 and 15 Hz were examined.Results show that the responses under excitation frequencies of 2 and 3 Hz include a 6 Hz component,which mneans that the maglev system is a critical nonlinear system.Moreover,the 6 Hz component is much stronger than the 2 Hz or 3 Hz components in the response spectra.There is the interaction between excitation and response.Under an excitation frequency of 15 Hz,intensified low-frequency perturbations were observed.