A high-pressure grouting forming device for ceramic sanitary ware comprises a rack, a grouting device, a forming mechanism and an air pressure device. The rack comprises a main frame, a bottom frame, guide rails and a pushing device. The guide rails are arranged above the bottom frame in parallel. The pushing device is arranged on one side of the main frame. The forming mechanism is arranged on the guide rails, and the forming mechanism and the pushing device are located on the same axis. The grouting device is arranged on one side of the rack. The air pressure device comprises an air pump and a strengthening air pipe. The compression air pump is connected with a pressure pulp tank and the strengthening air pipe through pipelines, and the strengthening air pipe is connected with the forming mechanism. Providing the high-pressure grouting forming device for the ceramic sanitary ware is the purpose, through operation of various procedures of die assembling, die stripping and blank stripping, the labor intensity of operators is relieved, and the production efficiency is improved; and meanwhile, in the die pressure applying forming process, residual water in pulp can be rapidly discharged through a water drainage mechanism, a die is made of porous resin, hydroscopicity is good, and the blank manufacturing efficiency is greatly improved.