Abstract: Sichuan basin is experienced polycyclic tectonic movement and multi-type basin superimposed then formed more than 20 hydrocarbon bearing series, so became a large superimposed petroliferous basin. Sinian system in the basin is one of the oldest hydrocarbon-bearing series also the earliest series found large gas reservoir (weyuan gas reservoir). As we known, the sinian system in the bottom of sichuan basin which formed long time ago and buried depth. The ancient hydrocarbon bearing serie experienced polycyclic tectonic movement .How to impact of sinian system Oil and gas geological conditions in deep basin by all previous tectonic movement that is the key to the evaluation of the oil and gas resource potential. Based upon this, I am from the perspective of tectonic evolution to to discussing the different tectonic movement how to influence the oil and gas accumulation conditions of sinian system, and meanwhile discuss about hydrocarbon source condition, reservoir condition and oil and gas accumulation and enrichment how to impact hydrocarbon accumulation, and then points out that where is the sinian system favorable zones for oil and gas exploration.