Outside-wall external insulation plate containing heat-preservation liner and preparation method thereof

The invention relates to an outside-wall external insulation plate containing a heat-preservation liner and a preparation method thereof. The outside-wall external insulation plate consists of two raised heat-preservation shells, wherein a heat reflection plate is arranged between the to raised heat-preservation shells and is fixed by a steel nail and a connection steel wire to form a heat-preservation liner; and two sides of the heat-preservation liner are respectively connected with an inorganic heat-preservation housing to form a flat-shaped outside-wall external insulation plate or a right-angled outside-wall external insulation plate. The preparation method comprises the following steps that: a heat-preservation liner is produced, a formwork erection pouring box is produced, the heat-preservation liner is arranged inside the pouring box, and inorganic heat-preservation sizing agent is poured into the pouring box to obtain the outside-wall external insulation plate after being maintained. The outside-wall