Abstract: The energy of the targets must be integrated when the range-distributed targets detecting problem are considered forradar with high range resolution. Based on adaptive single-scan radial integrated (ASSRI) detection algorithm and central limittheorem, a new detector configuration which suits the target detecting problem in K-distributed clutter is deducted, and the statisticalcharacteristic of this detector is analyzed in detail. The influences of some factors on performance of this detector such as distributionof the scatterer, shaping factor of clutter are discussed. In the end, simulated results that demonstrate the validity and stability ofproposed scheme are presented in this paper.