Abstract: Previous study on Kendong region which is near to the Tan - Lu Faults finds that the right lateral strike slip of Tan - Lu faults in Cenozoic has no effect on the hydrocarbon accumulation in Kendong region. Actually it is the bumped ancient physiognomy that controls the hydrocarbon accumulation in neogene. Through the analysis on stress field, palaeogeomorphology and spatial distribution of faults, Kendong region is considered to be 'concealed' strike - slip fault. The strike - slip fault has great influence on the hydrocarbon accumulation in Kendong region: on one hand it controls the spatial distribution of palaeogeomorphology, on the other hand it assumes oil - gas transmitting function in the process of hydrocarbon accu-mulation