Novel light wallboard

The novel light wallboard comprises a facing layer, an isolating layer and a main board which are arranged from top to bottom, the main board is a grating board, a pair of Z-shaped mounting boards are fixedly arranged on the two sides of a back board of the grating board at intervals, a plurality of bolt mounting holes are evenly formed in a bottom board of each mounting board at intervals, and a plurality of bolts are arranged in the bolt mounting holes. Transverse penetrating holes are formed in the mounting plates, a fixing rod is slidably inserted in the transverse penetrating holes between the mounting plates on the two sides, a clamping plate is arranged in the middle of the fixing block in a sleeving mode, clamping pipes are arranged at the two ends of the clamping plate, the fixing rod is sleeved with the clamping pipes, and a vertical frame is connected to the top end of the clamping plate in a pressing mode through a pressing plate. A pressing groove matched with the vertical frame is formed in the