Considering the fact that smart antenna can not be applied in TD trunking downlink and the capacity is limited due to the inter-cell interference (ICI), this paper proposes a combination of single-cell joint detection (JD) and decision feedback interference cancellation through partial successive interference cancellation to eliminate interference. By rearranging the total system matrix the accuracy of feedback is insured while the single-cell JD part avoids the expansion of the system matrix dimension, thus weakening the amplification of background noise. The scheme and conventional ICI suppression algorithms are analyzed and compared both in anti-interference ability and complexity. Simulation results verify the effectiveness and robustness of the scheme under a variety of multipath channels.