The utility model discloses a steam injection tubular is used in oil reservoir exploitation. This steam injection tubular post material and size of each section in through a plurality of section of adjustment, and then the heat loss of guaranteeing in a plurality of section each section equals. The steam injection tubular who generates according to the material of trying to achieve and size carries out the oil reservoir heating, and then can guarantee that each section steam injection tubular to the even heating of oil reservoir, has improved steam injection tubular's notes vapour effect, has reduced vapour and has scurried the phenomenon, and then improved oil recovery efficiency.