The Tongjiang-Yuejinshan accretionary complex on the western margin of the Nadanhada terranein northeast of China has great significance for reconstructing the subduction-accretion process of the paleo-oceanic plate, however, the formation time of the ancient ocean and its tectonic properties constrained from Tongjiang-Yuejinshan accretionary complex are still unclear. Based on our geological survey, we present the chronological data and geochemical characteristics of magmatic blocks in the Tongjiang-Yuejinshan accretionary complex. The results show that In-situ U–Pb zircon dating of basalt from the Yuejinshan complex has yielded a mean age of 313.8 ± 2.3 Ma, and show ocean island basalt (OIB) like geochemical features. A plagioclase amphibolite from the Tongjiang complex display U-Pb zircon age of 271.7 ± 2.3 Ma, and show mid-ocean ridge basalt (MORB) like major and rare earth element patterns. A basalt from the Tongjiang complex exhibits fore arc basalt (FAB) like geochemical features. Combined with previous research, our evidence above show that the Tongjiang-Yuejinshan accretionary complex was formed in the Permian-Late Triassic subduction-accretion process of the Paleo-Pacific ocean plate.