The reservoir volcanic rocks of Early Cretaceous Yingcheng Formation in the Qingshen gas field of Songliao Basin are composed mainly of rhyolites. SHRIMP zircon U-Pb ages of nine volcanic rock samples from Xingcheng and Shengping range from 111Ma to 115 Ma, falling into the Early Cretaceous Aptian to Albian stage. The volcanic eruption ages of the two regions suggest that all the reservoir volcanics were formed at the same period of volcanism, and this understanding is quite different from the previous opinions on these rocks. In the past, the volcanic rocks were thought to have different ages, and the volcanic reservoir rocks of Shengping were believed to be younger (K1yc3) than those from Xingcheng (K1yc1) . It seems that these opinions should be modified according to the authors' results. The results achieved in this paper is of great significance in exploring and exploiting volcanic gas pools within the Songliao Basin.