The invention relates to the field of building decoration materials, in particular to a back-bolt type composite board. An existing thermal-insulation composite board usually adopts a back-bolt type composite board and is installed on a steel keel foundation framework outside a wall, but connection of a back bolt and the thermal-insulation composite board is complex, and the machining difficulty is high. According to the back-bolt type composite board, one end of the back bolt is in fit connection with a back bolt groove in a panel, the other end of the back bolt is connected with a connectingplate, the connecting plate is arranged on the wall surface in an anchored and bolted mode, meanwhile the thermal-insulation board is connected with one face, provided with the back bolt groove, of the panel, and the thermal-insulation board is bonded to the wall surface. According to the back-bolt type composite board, the self weight is low, the thermal insulation effect is good, the back-bolttype composite board is in anchored connection with a decoration wall through the back bolt, meanwhile, the back-bolt type composite board is bonded to the decoration wall through the thermal-insulation board, and installation is simple and firm.