Roof heat preservation structure and construction method thereof

The invention relates to a roof heat preservation structure and a construction method thereof.The heat preservation structure comprises a roof base layer, a waterproof layer and a heat preservation structure layer, the waterproof layer and the heat preservation structure layer are sequentially arranged on the roof base layer, the heat preservation structure layer comprises a water storage assembly and a transmission assembly, and the water storage assembly comprises a baffle and a supporting plate; a water storage cavity with an upward opening is defined by the baffle and the supporting plate, a cover plate is arranged at the opening of the water storage cavity, and the daughter board and the mother board abut against each other to enable the cover plate to protrude upwards; the transmission assembly can force the daughter board and the mother board to turn downwards so that the cover board can be sunken downwards, and after the cover board is sunken downwards, a water falling opening allowing ...