The invention relates to Ruyao tea-dust glaze and a preparation method thereof. The glaze is prepared from the following ingredients in parts by weight: 17 to 21 parts of calcite, 18 to 25 parts of blackrock, 10 to 16 parts of mica and 35 to 41 parts of purple marble. Each raw material uses the reasonable mass mixture ratio and is sequentially subjected to ball milling by a ball milling machine and is sieved; a biscuit blank is subjected to glaze soaking and trimming; the blank body is put into a kiln to be fired in oxidizing atmosphere and reducing atmosphere; the Ruyao tea-dust glaze can beobtained. The Ruci artwork prepared by using the recipe and the manufacturing process provided by the invention has the advantages that the glaze color is the tea dust color, is simple, beautiful andintriguing; the fired porcelain has the attractive appearance; the novel glaze color is increased for the Ruci; the economic benefits of the Ruci is improved.