The invention discloses a supporting mechanism of a vacuum heat insulation vertical
storage tank. The supporting mechanism comprises an annular supporting unit and a top supporting unit, wherein the annular supporting unit structurally comprises a side face fixing
pipe arranged on the side wall of an outer cylinder body in a penetrating mode, an outer end opening of the side face fixing
pipe is sealed, a side face mounting
pipe is arranged in the side face fixing pipe, the outer end of the side
surface mounting pipe is fixedly connected with the inner end of the side face fixing pipe through afirst connecting piece, and the outer end of a
glass fiber reinforced plastic support pipe is clamped and sleeved at the inner end of the side face mounting pipe; and the top supporting unit structurally comprises a top fixing pipe vertically arranged on a top end socket of the outer cylinder body in a penetrating mode, an upper end opening of the top fixing pipe is sealed, a top mounting pipe isarranged in the top fixing pipe, the upper end of the top mounting pipe is fixedly connected with the lower end of the top fixing pipe through a second connecting piece, a
lantern ring is arranged atthe upper end of a
glass fiber reinforced plastic strut, and the upper end of the
glass fiber reinforced plastic strut is clamped at the lower end of the top mounting pipe through the
lantern ring ina sleeving mode. By means of the supporting mechanism, external heat is not prone to be transmitted to an inner cylinder body.