The invention belongs to the field of pottery, and particularly relates to a preparation method of a product of a pottery body applied with greenish yellow multi-layer method transmutation glaze. A novel unique glaze formula is adopted, ground glaze is prepared from the following raw materials: feldspar, argil, tugu, limestone, talc, suzhou clay, barium carbonate, ferric oxide and cobaltous oxide;cover glaze is prepared from the following raw materials: feldspar, boron clinker, limestone, talc, titanium dioxide, zinc oxide, suzhou clay, quartz, titanium yellow pigment and lithium carbonate; through a glaze immersion method, the ground glaze and the cover glaze are applied in sequence, and one-step high-temperature firing is conducted in a roller kiln, wherein the firing temperature is 1,190+/-10 DEG C, and the firing cycle is 5 hours. The product of the pottery body applied with the greenish yellow multi-layer method transmutation glaze has bright and glossy enamel, shows a complex hue of green touched with yellow and embodies an internal source of the greenish yellow multi-layer method transmutation glaze, so that the glaze of the whole pottery product has vivid color contrast, and a distinctive transmutation glaze effect is achieved.