There were abundant with unconformity surfaces in Luliang uplift in Junggar basin which were significant to the hydrocarbon migration and accumulation. The unconformity surface in the bottom of Permian system and Triassic system was key factor for hydrocarbon accumulation in the late period of Jurassic; the unconformity surface in the bottom of Jurassic system was favorable migration path for hydrocarbon accumulation in Jurassic system; the unconformity surface in the bottom of Cretaceous system was necessary element for the hydrocarbon from Jurassic system to come to Cretaceous system. There were five unconformity types, which played different roles on the hydrocarbon migration and accumulation in the research section. The distribution of the unconformity has "three characters": difference, succeed, and transfer, which had great influence on the hydrocarbon distribution and reallocation.