Abstract: Thanks to resurgence of the global economy, particularly the rapid development of Chinese economy over the recent years, energy demands from both world and domestic markets are so big, which has led to the greatly increasing of the need of OCTG. Discussed in the paper are the situations concerning the global and domestic petroleum and natural gas resources and consumptions there of as well as the supply-demand of OCTG. Also analyzed are the relationship between the resources of oil and natural gas, steel tube production and OCTG supply, based on which it is concluded that the supply would exceed the demand in the world OCTG market. In addition, investigations of the current demands for OCTG in different market places in the country are made, relevant problems pointed out, and countermeasures proposed. Finally the future demand for OCTG is forecast, and risks concerning investment in OCTG industry warned against.