Abstract: Based on the characteristics of the digital radio mondiale(DRM),a new method of arraycalibration for high-frequency passive radar(HFPBR)by using frequency reference signal of directwave is proposed.Firstly the signal structure of DRM is introduced,while the feasibility of take fre-quency reference signal as the calibration source is demonstrated.Secondly,taking into account the e-lectromagnetic environment and time-varying non-stationary propagation characteristics,a method ofchoosing high quality direct wave period by the shift-invariant antenna pairs is proposed.Finally,as-sist by the known DRM transmitter position,we utilized this method deal with measured direct wavedata which propagate in surface wave mode and sky wave mode,compared the result of array calibra-tion value with known single frequency signal source.The results showed that the amplitude andphase compensation method in DRM-based HFPBR is effective.