A graphene heating plate is proposed to replace the infrared lamp as the heat source of the drying equipment of the glazing machine, and the best experimental method and preparation process of the graphene heating plate for printing and drying are screened out. By analyzing and researching the drying requirements of water-based glazing oil, the drying control system of water-based glazing machine was designed, and the graphene drying heating source was prepared by screen printing technology. The single factor experiment method was used to study the impact of solvent type, curing temperature and coating thickness on the electrical conductivity and curing effect of heating plate, and conduct energization test to study the electrical and thermal conductivity of the heating source. The experimental results indicated that pure water could be used as a solvent to obtain a conductive coating with good firmness and smoothness. When the high sintering temperature was between 465 ℃ and 480 ℃, the curing of the graphene electrothermal coating met the requirements of the drying system of the glazing machine, and the coating with a thickness of 5-20 μm could meet the conductivity and firmness of the heating plate at the same time. The average resistance of the heating plate showed a downward trend with the increase of coating thickness and carbon mass fraction. As the heating plate was energized for a longer time, the current and the resistance became larger and the heat generated by the heating plate and the temperature rise of the drying source became higher. The research shows that grapheme has good electrical and thermal conductivity, and a reasonable preparation process and method for the grapheme heating plate are obtained. It provides a solution for the application of graphene heating sources in the field of printing and drying, and offers technical support for the introduction of screen printing technology into the green drying system.