The invention discloses a low-carbon low-silicon hot-rolled coil used in a mobile conveying pipe and a manufacturing method thereof, and belongs to the technical field of pipeline steels. The coil is prepared from, by mass, 0.02-0.08 % of C, 0.01-0.05% of Si, 1.2-1.6% of Mn, 0.015% or below of P, 0.002% or below of S, 0-0.05% of V, 0.02-0.06 % of Nb, 0-0.3% of Cr, and 0.01-0.05% of Ti, and the balance Fe and inevitable trace impurities, wherein the inevitable trace impurities comprise granular bainite, ferrite and pearlitic structures. The manufacturing method comprises smelting, continuous casting, double heating, rough rolling, finish rolling, cooling and reeling. Through optimization of designing of allotting components, and controlling of the cooperation of technologies of heating, rolling, and reeling, the obtained coil has a good comprehensive mechanical property, surface quality, and a coil shape; meanwhile, the coil is applicable to mobile conveying pipelines, and can meet demands of corrosion prevention and galvanization.