The distribution, structural pattern, combination model and surface feature of Nileke earthquake fault on March 8, 1812, are studied. The seismic fault is dip-slip type, consists of three segments and distributs as same as Kashi rive fault. Main seismic faults are normal fault, strike slip-normal fault, thrust fault and seismic crack. The vertical displacement is four times of horizontal one. The disagreement of the seismotectonic and the seismic fault is discussed.