The invention relates to the field of a building decoration material, and especially relates to a building insulation ceramic material and a production method of a raw material. The invention relates to a foam microcrystalline glass preparation method, which is characterized in that the foam glass taken as the raw material is subjected to heat treatment to obtain the foam microcrystalline glass, during a heat treatment process, nucleation is carried out in advance, and then crystallization is carried out, the glass is in a periodic movement state during the nucleation and crystallization processes, and then after the cooling is complete to the room temperature, the required foam microcrystalline glass is obtained. The foam glass preparation method comprises the steps of melting, homogenizing, clarifying, and forming and bubble guiding to obtain the foam glass. According to the method, the foam glass is subjected to heat treatment to obtain the microcrystalline glass, bubble forming and crystallization are carried out step by step, the quality of the bubbles is guaranteed, sensible heat effect of hot slag can be directly used, so that continuous production of the foam microcrystalline glass is realized, product energy consumption is reduced, and the finally obtained foam microcrystalline glass has the advantages of low thermal conductivity, high intensity and wear resistance, and high product added value.