The invention discloses a building thermal-insulation formwork automatic continuous coating machine and a coating method thereof, and relates to equipment used for board double-face gluing and composite material coiling and a method of the equipment for conducting gluing and composite material coiling. A good coating effect is achieved. A hot-pressing embryonic plate automatic coating machine comprises a first rack, a second rack, a rubber roller, an upper steel roller, a lower steel roller, a main material trough, a first material segregation trough, a second material segregation trough, a third material segregation trough, a first material soaking roller, a second material soaking roller, an upper tensioning guide wheel, a lower tensioning guide wheel, a driving motor, a transmission case, an upper coiled material, a lower coiled material and control equipment. The rubber roller, the upper steel roller, the lower steel roller, the main material trough, the third material segregation trough, the upper tensioning guide wheel, the lower tensioning guide wheel, the driving motor and the transmission case are installed on the first rack, and the first material segregation trough, the second material segregation trough, the first material soaking roller, the second material soaking roller, the upper coiled material and the lower coiled material are installed on the second rack.