The invention discloses a high-temperature-resistant and wear-resistant nano-ceramic valve plate and its technology, which adopts the preparation of castables, material testing, manufacture of heat-resistant steel support frame and valve plate formwork, installation of plastic caps, pouring molding, maintenance, First low-temperature baking, second high-temperature firing, finished product acceptance and other steps, before baking and firing, the step of installing a plastic cap is added. After firing, the plastic cap can be melted, so that the anchor nail and the valve The expansion gap can be formed between the plate bodies, which can give the valve plate a certain expansion space, prevent the valve plate from cracking when heated and expand, and prolong the service life of the valve plate. After a low-temperature baking, a second high-temperature baking is added The firing temperature reaches the working condition of actual use, so that after firing, the product is tested by placing the formed valve plate in a medium-high temperature to simulate the working condition to ensure the quality of the product.