Abstract: The exploration of the Paleozoic buried-hills in Zhuangxi and Chengdao areas has achieved great results. In terms of tectonic evolution, the buried-hills in Zhuangxi and Chengdao once belonged to the same structural zone in geological history. Based on analogy analysis, the low parts between two buried-hills show favorable conditions for hydrocarbon accumulation, which might results in the formation of a united play in the buried-hills. Therefore, the connective parts between Zhuangxi and Chengdao may be a potential area for hydrocarbon explorotion.