There are many discoveries in Ordovician oil and gas development in the northwest of central Tarim Basin，but there are few studies on types and main controlling factors of Lianglitage reservoirs，which has seriously restricted the oil and gas exploration and development in recent years. Based on core observations，rock section and casting section analysis and logging data and combing with experimental data on petrology and geochemistry of the Lianglitage Formation，it is concluded that the reservoir space is dominated by cavities and fractures in this area. The reservoirs are mainly of fracture-cavity type，fracture type and cavity type. The carbonate reservoirs in the Lianglitage Formation are controlled by many factors.The sedimentary microfacies provide the material foundation for the development of the reservoir，among which high energy grain beach at the platform margin is the most advantageous place for hydrocarbon entrapment. The karstification and tectonic rupture of reef beach bodies play an important role in controlling the size and distribution of high quality reservoirs.Integrated analyses indicate that platform margin in A-Dong area，where the degree of exploration is low，and its inner fault zones are favorable for development of cavity-fracture in the Lianglitage Formation.