Abstract: Studies have been conducted to analyze the stratigraphical sequence，tectonic characteristics and basin evolution of the Mohe Basin in Heilongjiang Province．The results suggest that the Mohe Basin is located in the collision sutures of E’erguna micro-plate and Siberian Plate，belonging to Mongolia-Okhotsk fold belt．Its foundation consists of the Triassic metamorphic rocks and the Cambrian granites，and the sedimentary covers are mainly terrestrial coal formation(Jurassic) and the volcanic rocks(Cretaceous)with a typical dual structure．Because of the closing of Mongolia an d Okhotsk Ocean and the collision of Siberian and E’erguna micro-plates ，the western part of the basin produced cover structure in the opposite direction，and the strata was shortened more than 64 km in the Early Jurassic．During the Early Jurassic and the Late Cretaceous，the basin was affected by west Pacific tectonic evolution and was in extension environment．The volcanic and faulted basin was formed be cause the volcanic activities took place on a large scale three times in the middle and western parts of the basin．Because the Mohe Basin has experienced two kinds of evolution i.e.，the Mongolia，Okhotsk and west Pacific ocean structural evolution，therefore，the basin is characterized by compression in west part，extensional，faulted structures in the middle and east parts．