The strike-slip structure characteristics of Yidong fault zone and its influence on the hydrocarbon accumulation is unclear in Zhanche area of Jiyang Depression，which restricts the oil and gas exploration in this area. To solve this problem，the strike-slip structure characteristics of Yidong fault zone in Zhanche area were analyzed based on data of seismic，logging and drilling，and the effect of strike-slip faults on hydrocarbon accumulation was evaluated. The result shows that the faults in Yidong fault zone have typical strike-slip characteristics as follows：①in the plane，the main fault（F1）is intersected by its associated secondary faults（NWW）with acute or right angle，presenting the shape of“入”；while the main fault and its parallel faults in the two sides distribute in NEE-NE direction，presenting an en-echelon form；②in the vertical，the main fault has steep fault plane and the associated secondary faults are broken up to showing minus flower structure figure in seismic section，which leads to the formation of narrow and steep half grabens. The Yidong fault zone controls the development of multi-stage and multi-type sandy conglomerate fans and NE-direction distributed fault block，fault nose and fault-related anticline traps. The Yidong fault seals the hydrocarbon laterally but acts as paths for hydrocarbon vertical migration，which results in the belt-like hydrocarbon distribution characteristic along the fault zone.