The utility model discloses a hydrate tubular displacement reaction experimental apparatus, including a tubular reactor cauldron, tubular reactor cauldron one end is provided with always advances the pipe, and the tubular reactor cauldron other end is provided with total exit tube, always advances the pipe and is linked together through first pipeline and first advection pump, and first advection pump is linked together through a second pipeline and a storage jar lower part, is provided with first connecting line between first pipeline and the second pipeline, total exit tube is linked together through third pipeline and storage jar upper portion, is connected with the fourth pipeline on total exit tube, and the fourth pipeline is linked together with the second gas cylinder. Change situation through each parameter among the relevant sensors monitor hydrate reaction sequence to confirm the hydrate and induction the phase, generate the anisotropic distribution situation of speed, saturation and hydrate, thereby acquire the formation distribution law and the relevant parameter of simulation seabed carbon dioxide hydrate.