The multipath clutter cancellation, the most computationally demanding part of signal processing in passive bistatic radar (PBR), is a key challenge in real time processing. However the previous Extensive Cancellation Algorithm (ECA) versions have their limitations in parallel implementation. In this paper an advanced version of ECA is proposed for multipath clutter cancellation in passive radar. Validated by simulation and theoretical analysis, the proposed algorithm can improve the computation efficiency with an excellent cancelling capability, which provides a valuable basis for real time signal processing in PBR.