The Permian volcanic rocks in Sichuan basin contain rich oil and gas resources. The reservoirs are buried deep, and the deep wells are faced with many difficulties, such as multiple pressure systems, poor drillability, high temperature and high pressure, narrow safety window density, and poor wellbore stability problems, which bring great challenges to drilling engineering. In view of the geological and engineering difficulties, the optimal and fast drilling technology for volcanic rocks in Sichuan Basin is put forward. Optimization of the construction plan of the five-spud in and five-completion well in the volcanic rock zone which adopts the compound drilling technology of high-efficiency bit for different strata and supporting various speed increasing tools, the average mechanical drilling rate of difficult-to-drill formation is effectively increased. Fine controlled pressure drilling technology is applied to narrow safety density window and multi-pressure system formation, realizing dynamic balance control of bottomhole pressure, the loss of drilling fluid was reduced by more than 86.7% . The developed anti-collapse and plugging oil-based drilling fluid system ensures smooth borehole, maintains wellbore stability and reduces downhole complexity. The results show that this technology is remarkable, which provides a technical guarantee for accelerating the exploration and development of the block.