Abstract: The Mesozoic volcanic belt in the Changbai Mountains is parallel to the ocean continent boundary to its east. Volcanism occurred in three major tectonic stages (230~190, 178~125 and 118~65 Ma), four megacycles, 11 cycles or 24 volcanic events. A new tectonic type of volcanism composed of the latite series and calc alkaline series is called the strike slip continental margin pull apart tensile fracture volcanic series. The changes in the mode and rate of movements of oceanic and continental plates is the main controlling factor for the process of dynamic development of volcanism at depths.