Abstract: The characteristics of granitoids petrology and geochemistry in the north margin of Songnen Massif indicates that the Neoproterozoic granitic bodies have typical rock association and ortho-succession magmatic evolution series belonging to convergent plate boundary. The Keluo pluton is I-type granite and formed in a tectonic setting of the continental arc. The Shuanghe pluton is S-type granite and formed in the zone of the intercontinental collision. The Jiutoushan and the Liutun units formed in post-orogenic and epeirogenic uplift periods, respectivly. The tectonic magmatism suggests that the plate tectonics had operated in the north margin of Songnen Massif in the Neoproterozoic.