The utility model provides a circulating line is connected that modified asphalt heat preservation device of high pressure steam inner loop formula, connecting pipe one end sets up in the outside of pitch container, inside the other end of connecting pipe and the pitch container. Vice standpipe, the person in charge, the vice horizontal nest of tubes become the circulating line and set up the inside at the pitch container, connecting pipe one end is connected with high -pressure steam pipe, and the connecting pipe stretches into the inside section of pitch container and is connected with vice standpipe, the person in charge respectively, the end connection of vice violently pipe and vice standpipe, vice circulating line that two vice violently manages, the circulating line is constituteed jointly to vice standpipe, vice circulation pipe setup is responsible for the centre that sets up in pitch container inside at the inside edge of pitch container, is responsible for the main circulating pipeline into the circulating line. Circulation pipeline divides give first place to circulation pipeline and vice circulation pipeline two parts in the high -pressure steam of this structure, mutually supports with middle main circulation pipeline through the peripheral vice circulation pipeline of pitch container and to mend the pitch in the pitch container temperature, to keep warm effectively.