The invention discloses an automatic processing device for a large-size domestic ceramic product and a technique of the automatic processing device. The processing device comprises a ceramic product mould mechanism, a rolling forming mechanism, an automatic demoulding mechanism and a controller, wherein the rolling forming mechanism and the automatic demoulding mechanism are both connected with the controller and are controlled to act by the controller. According to the invention, through arrangement of the automatic demoulding mechanism for the large-size domestic ceramic product, demoulding is realized mechanically and automatically, time and labor are saved, the demoulding efficiency is greatly increased, and the production cost is lowered; by utilizing the automatic demoulding mechanism, the whole demoulding procedure is greatly simplified, and the production cost is further lowered; and the production and demoulding process of the whole large-size domestic ceramic product is completed automatically, no manual work is needed, the degree of automation is high, and the use requirement is met.