Abstract: The practice of oil and gas exploration indicates that the formation and distribution of hydrocarbon reservoir in most
petroliferous basins are controlled by the distribution of the fault. The study of petroleum geological characteristics，submitted
reserves in the oil region and the prediction of favorable area of the Fuyu oil bearing layer in the LiangjingEast–Mutousouth
Area shows that the delta front sandstones with the provenance direction of southwest matches with large Antithetic Normal
Fault with high angle fracture skew or vertical to NNW fault，which form adjacent the concave side of the favorable oil–rich
conditions. In this paper，studies are made about the formation mechanism on the Antithetic normal faults and the background
of the study area，development and distribution characteristics，as well as the Antithetic normal faults to oil accumulation
mechanism – model and we find out that the Antithetic normal faults effects on hydrocarbon accumulation and distribution in
the following respect type of oil and gas accumulation，degree of enrichment of oil and gas hydrocarbon accumulation layer，
and site of hydrocarbon accumulation. Such findings are of great help in petroleum exploration and development in the future.

Key words: antithetic normal fault, Fuxin uplift zone, hydrocarbon accumulation, Fuyu oil bearing layer, Liangjingeast–Mutou south