Abstract: A scaling resistant ceramic glaze and a functional overglaze for Q345 hot rolled alloy steel double sided enameling. The components and the weight percentage of each component of the ground glaze of the enamel are as follows: 3-6% of Al2O3, 60-70% of SiO2; 10-15% of B2O3, 10-15% of Na2O+K2O+Li2O, 3-6% of CaF2, 3-6% of ZrO2, 2-5% of CoO+NiO, 1-3% of BaMoO4+Sb2O3, 0.3-1.5 of WO3. The ground glaze is prepared by formulating chemical raw materials in a weight ratio converted by the described chemical composition, stirring thoroughly and mixing uniformly, melting same in a rotary furnace at 1200-1350° C., and then quenching the melt. The provided scaling resistant ceramic glaze and functional overglaze for Q345 hot rolled alloy steel double sided enameling can be applied to Q345 steel that contains C, P, S and the like which are considered harmful elements and contains a variety of common alloy elements.